You still need to look professional and presentable; however, that's easier to do in a virtual format. You'll need a suit jacket (notch lapels, 2 or 3 buttons, good fit in the shoulders). The ideal colors would still be navy or charcoal. Avoid black. A true blue or medium gray would probably work fine in most cases. Probably wouldn't recommend light gray, light blue, tan, green, brown, etc. Make sure your shirt collar fits and spend more time on your tie knot. I suppose you don't technically need a full suit at this point in your career, but wear SOME dark trousers in case someone asks you to stand, although that would be exceedingly rare.
But eventually a professional man WILL find a need for a real suit. Surely you expect to have a wedding, (hopefully not) a funeral, court date, REAL job interview (residency, fellowship, attending), christening/baptism, graduation, etc at SOME point? Keep in mind your body may change over a span of years, so it's understandable if you don't want to spend too much at this age. But I am enjoying my slowly growing suit collection more and more as I become more established. When I total all the occasions, I find that I have worn a full suit on at least 3 dozen occasions, probably closer to 4 dozen. The key is to buy SLOWLY as you learn more, as your taste and sartorial knowledge (and budget) is bound to grow over time.
At this point my suit purchases have been:
1) Gray, relatively cheap from Mens' Wearhouse, used for >12 medical school interviews, gave away to Goodwill as it had more than served its purpose
2) Navy blue, $400 plus tailoring from SuitSupply, used for >10 residency interviews (in-person), 10 fellowship interviews (virtual), >2 weddings, still going strong
3) Dark gray (not quite charcoal), $600 plus tailoring from SuitSupply, wore to work >10 times, attending job interviews (mix in-person and virtual), still going strong
4) Light gray in tropical wool, $300 (on sale) plus tailoring from Spier and Mackay, have not yet worn as it's currently at the tailors, but plan to get a lot of use out of it during the summers as it's lightweight and breathable.
I've become a suit lover and can't wait to expand the collection to include some less conservative ones (linen, something in tan or green, something with a subtle stripe or pattern like Prince of Wales checks, etc) but that's a topic for a different forum.....