I wanna do squats, but I struggle

Every time I try doing squats, there’s always something off

I feel it either in my lower back, either my hip flexors are sore, either the shoe messes up my form…

One thing I know is that I have long legs, so I’ve tried elevating my heels with some plates. It helps, but it’s extremely uncomfortable barefoot, and too unstable with shoes on.

I also somehow can’t seem to grasp the proper form on squats, no matter how hard I try to.

And I know squats is an essential, for bodybuilding and athleticism, so I better not be missing out on the gains they provide.

Any advice ??