Only thing I got downloaded is coin base
yeah thats a good start. Download Google Authenticator also if you don't have it and set up 2FA, 2 factor authentication. basically gives you a minute long code to input when making transactions that changes after the minute is up. that way if someone gets your login info they have to have access to the code which is stored on your phone. an extra bit of security. can also use it for kucoin and other exchanges. get kucoin also even if its just to have. anything that can be a backup exchange. the authenticator may be an inconvenience always having to go look for the code at times but better to be safe than deal with any issues. can also use it for social media sites, and a few other things.
far as buying, yeah btc and eth are good. i been buying eth and was doing btc before but stopped and just got back on. what i'm doing is dollar cost averaging, which means putting a bit of money over time. I was doing $100 a week but switched it to $15 a day which is 16.50 with fees. actually gotta see what my fees were at 100. actually 3 dollars now that i check so thats less than the daily so i might just switch that back. but those 2 are good and safe plays. one i really like is atom. prolly my favorite cuz of all the air drops I've gotten. that one has staking and its own ecosystem thats been growing a lot. eth has an ecosystem too but its more expensive. link is another good one but its been underperforming lately. coins were much cheaper back in 2020 but luckily everything has been dipping so you still getting in early on lots of stuff. avax also has its own ecosystem, not too familiar with all of it, but its a good one. one we mention often here but not on coinbase is fantom (ftm). i think kucoin has that one. great ecosystem.
when i got real heavy into crypto after the march 2020 crash, since i wasn't too into it before, i decided to go with cheaper coins like link and atom instead of with bitcoin. figure that getting more coins of something cheap would be better than 1 bitcoin. since the amount you put in is what determines your gains and losses. so if you put in 2k then btc has to double for you to get 4k and so on. so i like putting my eggs in different baskets and getting gains from different avenues. that way if one coin slacking, i got another to help out.
you also should get a metamask wallet. metamask.io should be the site. its a web browser extension best to do it on a pc. that one gives you access to eth, avax, and ftm ecosystems. as well as bsc but you need binance for that since their coin isn't on coinbase.
best bet would be to put in something on a consistent basis unless your risk tolerance is high and you can throw the entire stack in at once. your age and other funds will help determine that. if you're in your early 20s than its easier to take risks than if you're in your 50s. but of course it depends on each individual.