Pronunciation drills as a beginner?

I’m obviously not at the stage yet where I’m outputting but whenever I read or do my Anki reps, I subvocalize and sometimes even read out loud. The issue is, I don’t want to drill bad pronunciation into my head, or rather my muscles.

If I do pronunciation drills now, my subvocalization and reading will, of course, become less bad (albeit still imperfect). On the other hand, if I do drills now my unconscious mind may become complacent and not improve as much on its own as had I not done them. Another thing is that my ears are not yet at a near-native level so I imagine it would be hard for me to actually do pronunciation drills because I can’t give myself feedback well as to whether something I said sounded good or not. I could be taking iTalki classes where I do nothing but pronounce single words (or single morae) in isolation and maybe read a text out loud to my teacher but before I invest in that I thought I’d ask here.

This may come off as overthinking or whatnot but I honestly think not caring about phonology is what caused my English to be so non-native sounding even after 10 years of massive exposure, something I’d really rather not repeat with Japanese.

On a related note, my native language also realizes R as a voiced alveolar tap, just like Japanese. The issue is, however, that they sound pretty different lol. I feel like learning to produce something that’s slightly different from one’s native languages is considerably more difficult than just learning a new phoneme altogether.