[2021] Never played online shooters before.

In fact I've never even had an online subscription before. However, considering the game discount, and the fact that my friends are urging me to play, I'm really tempted to do so tonight. I've plenty of experience with single-player action shooters; doom, resident evils, army of two games, goldeneye, cod waw, cod mw, cod blops 3, tom clancy's division, gears of wars, etc. But I've always felt like I've been missing out on this genre. Is this a good place to start? How thoroughly can I expect to get my ass handed to me? How much effort to git gud? I fully expect what's gonna happen walking into an online server of people who've spent two decades on competitive first person shooters, but how high is the skill floor for it to be fun? I'm on ps4; is there anything I need to be aware of? Thanks .