Lite Version

[floral hollow]

Fabric is a lightly running mod loader that would be able to suffice for this, so I recommend just using fabric

[earnest sleet]

could it run on only 4 gb of ram,

cuz thats all i got to allocate

[steep salmon]

4gb is pushing modded minecraft overall fabric just might work, but a lite version for 4gb ram would barely be a modpack, theres the skyblock version which is a lot less resource dependant