You have already taken the first step, create a big stir, to maintain it, now you need to distribute an airdrop.
The further road has already been trodden - this is the creation of a good defi system:
- Creating landigs with a point system
- Cooperation with already established protocols (Uniswap, AAVE)
3.Systems for stimulating users with their own token - Continued marketing through various influencers
Good luck with your expansion into L2 solutions!