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I always recommend Pentax MX. It's fully manual, it only requires batteries for the meter if you want to use that. It's small, it's pro-tier, it's cool looking and it's not meme'd into stupid prices like the alternatives from Nikon or Canon. You can put all Pentax lenses on it, I recommend getting Pentax-M lenses because those are all manual and obviously would be cheaper than ones that have aperture control shit on them (Pentax-A).
If you want to go cheaper you can get Pentax ME super. That one requires batteries to operate, but I remember enjoying that too much. You regulate the speed with two buttons on top, it's a fun camera.
>I am thinking about an 23, 35 and 50mm lense.
You don't really need the 35. The difference is not that to require a third lens in between 20-something and 50mm.
In any case, it doesn't really matter what you get. If you're new to film photography just get something and you'll find out in time what stuff you want your camera to have and you'll buy it next. Pretty much all big brand lenses are decent, so you won't have issues with those if you buy them at good condition. The camera is just the mechanism, as long as it has what you want (faster speeds, comfy controls) you just need to find one that looks cool to you and that you enjoy holding.