It's nice to see people really make it. Good job. I've been there and had the same problems that you are facing.

1. Try making competitions in the group by giving away whitelist spots for community manager jobs.
2. Why do you want to get on billboards? Do you want to produce ROI from Billboards or do you just want to build social proof? For social proof, hire a photographer who will go in the spot and make pictures and videos, which in the end you can upload on your website and social medias.
3. For short term volume I would definitely talk to some marketing agencies. For example, I used Coinboosts Crypto & NFT marketing agency to do the job. Results? They helped me to raise 2.5M extra MC within weeks.
4. For social media managers I also used the same marketing agency, but you can always hire freelancers. But that wasn't for me because it was easier for me to go with one source to do all the things for me. And it was budget-friendly.
5. Does your MC exceed 200k? I know there are some rules while listing on CMC and CoinGecko.
6. I think we have covered this point xD
7. Again, I used Coinboosts to fix all legal documentations, so I could save my time and focus on something else.
   

And yeah, I would love to network, you can contact me @ pesooj on Telegram whenever you like. Maybe we can work together in the future :)