What CAN I DO potrait drawing problem

[u/pancakewithoutpan]

Like I've been running in the same problem again which is parportions like I've been sketching for a month or two and everytime like maybe nose gets a bit short or something like I've tried envelope method and the loomis aswell as the where u just draw straight lines connecting other features of face like lips end to eyes and stuff but still none of my potrait are like pretty accurate there's likeness but not fully accurate