I would say something like...

25% BTC
20% ETH

With these two you have a very resilient ground for the long term.

15% AVA - One of my favourites, check the posts on my feed.
15% ORN - My highest bet into Defi
15% LEO - For obvious reasons (In addition you can pair with the ETH into uniswap).
5% HIVE - Hive it's Hive after all.

5% USDT - To load the dip.

AVA & ORN are both of my personal choices, but overall can be any coin that you researched and u feel confident enough, just make sure to not go all-in/all-out.

Max 5 alts apart from BTC/ETH, if you dilute too much you'll have a bad time dealing with all the updates and the study.

Best of luck!