There’s nothing wrong with your posts but you only have twelve so far. Growing a following takes time and consistency. Try to make one post everyday for 90 days at least before you worry about not growing enough. I think reels work better than normal pictures. If you don’t want to do reels I’d do carousels. Trying to sell from instagram posts right away to coaching is pretty difficult. You’ll likely need more goodwill and trust from your audience. You could think about giving away a 1 hour coaching session for free as a lead magnet. Then try to upsell from there after you’ve proven your competence. If this doesn’t work try to do complete coaching programs with people 100% free. Use this to improve your coaching and collect testimonials. Then make instagram posts using your testimonials getting people to sign up for the 1 free hour of coaching lead magnet and sell from there. It’s good that you have a lot of experience with LDs. But your potential customers believe YOU much less than they do other customers. That’s why it’s important to get testimonials.  Look at what topics other people in the LD/OBE are posting and which topics/ questions go viral most often. Use these for posts. You have to think in terms of problems. Which problems do lucid dream beginners encounter? Lead with that. I know for example that I always used to struggle with stabilizing my LDs. You could use that as a hook. For example: ‘Struggle stabilizing your Lucid dreams?’ in a reel.  Watch Alex Hormozi’s free $100M offers and $100M Leads courses and take notes on everything. Also watch his YT videos on social media.  

Context: Todd V is a pick up artist that used to be a RSD coach. He's known for being very methodical in his cold approach style, but here you can see how he's also very methodical in his marketing. You may find some insights for your own business.
I haven't purchased any of his product, so this is all information you can gather from his socials and website. I did this because I'm interested in marketing and I was familiar with Todd.
Free Layer
The funnel starts with free content, on social media. YouTube is probably the main one. YouTube is the platform that allows most trust  to be built, because of the longer exposure.
The next level is the two lead magnets:
A collection of infields A course on inner game To unlock these you give your email, where email marketing begins.
Newsletters contain little value, but are not bothering to read. Each of them has one or multiple pitches. Some of them are notifications for "special sales", more on that in a minute.
This is all the free stuff. Todd is giving loads of value for free, and you start to trust him more and more. You create a positive association, start to interpret him as an authority figure, he starts to stand out as someone who is a viable solution to solve your dating problems.
Course Layer
Todd sells multiple products/services, but they're very purposefully structured.
The first paid layer are the courses. There are 4 of them, all one-time purchases:
The System (his overall framework for cold approach) €397 Verbal Game Academy (conversation) €597 Value Masterclass (conveying value & attractiveness) €347 Online Dating Academy €397 Together, the 4 courses provide a very solid dating foundation. Despite that, they are only the tip of the iceberg. Todd could price them higher, but he doesn't, because they're meant to be a low-entry barrier to create even more trust and get people to the real juice: the next layer.
In fact, he routinely discounts the 4 courses at €197, which allows for the compelling [50% off!] headline.
Coaching Layer
The courses are pre-recorded, the coaching is tailored to you. And it's much more expensive. Todd offers 3 services, some are to small groups, some are online, some are still one-to-many.
Mentorship Program €400/month with community, access to coaches for questions, and some live Q&As Digital Black Belt €300/week all about online dating, helps you create a profile, create pictures with AI (yes), and more In-Person Bootcamp €1000/day the classic cold approach bootcamp As you can can see, coaching costs the same as a course... per month, per week or even per day. The first two are online, the bootcamp is in person.
Memberships are known to be far more profitable than one-time purchases.
To lower the entry barrier to the subscriptions, there's often a "free trial" giving the first month or the first couple weeks at $1 (I guess to collect credit card information and remove friction through auto-billing future payments).
You can/have to book a sales call for some of those.
 
I think this is about 85% of his marketing. You could analyze his landing page's copy, or his video's CTAs, but this is the main funnel.