just need help on coming back to the game

heard skyblock supports 1.21+ mc now, just wanna come back after seeing all the dante v2 shits here, also I lost all my mods and other skyblock stuff after migrating to a new computer so that sucks

do I just use a client (and if so, what client) to be able to use mods again? or do I just use the vanilla launcher and install fabric + mods on it?