I'm not an audiophile but I am a dj and music producer. I'd say the others who commented so far say not to look for "computer speakers" and they're right. Soundbars and all that crap will sound like shit compared to any set of regular speakers.

But I wanted to add that the easiest speakers to buy and use are probably powered speakers. Meaning that you power the speaker directly with a power cable, and you send the speaker the audio signal. Other non powered speakers require an amplifier/receiver. Aka a third piece of gear you'd probably rather not have to research or buy.

So I'd recommend any powered speakers that are within your budget. Larger speakers will yield more bass because they can move more air aeound. Sound is just wiggly air. Depending on your room size, I'd probably recommend something at least with 7inch or bigger bass drivers (the bigger speaker cone). Someone else mentioned KRK which is a pretty cheap brand but they don't sound terrible especially if you go for the larger ones.

As far as connecting powered speakers to your computer goes, it's really not that expensive to buy a simple audio interface. I'd highly recommend the focusrite Scarlett 2i2. I have one as a secondary interface to my main one. It's rock solid. Just plug it in and it works. There's a volume knob on the front. Get some quarter inch audio cables to go from the back of your focusrite to the powered speakers. Done. Enjoy and hopefully this helps.

Edit: I should add that I've been using a pair of Fostex PM2 mkii powered speakers as my main music production speakers for the past 10+ years. I write, mix and master every song I've released. Look me up on Spotify. My most popular song has over half a million plays. I mixed and mastered that song myself on my trusty Fostex. So hopefully that makes my advice more credible.