The New Adventure is a kitchen sink pack for Minecraft 1.15.2. There are a large number of mods covering tech, magic, exploration, and various quality of life mods.
This is meant to be more of a laid back experience, so config changes and recipes changes have been kept to a minimum.
A minimum of 4GB of RAM for both the client and server is recommended.
If you are encountering rendering issues (such as invisible doors, disappearing buildings, etc.) try adding Optifine to the pack.