Advice on building an online portfolio of work while balancing privacy?

cross-posted from: https://lemmy.world/post/20402370 or https://lemm.ee/post/43793474

Technically, I have some online activity I could try to refer to for work purposes, but it would mean sharing content tied to usernames/profiles I think of more as casual and personal. I could delete those profiles and move the relevant work to usernames/profiles I'm willing to share, but then I'm less likely to use those as much for portfolio building as I wouldn't want to contribute/do things online under a more public-facing profile, or link my personal ones to said profile.

Any which way I think about it involves crossing private/public streams I'd prefer to keep uncrossed, but I'm thinking I may be overlooking some compromises that could work, so what might those be?