I'm in with recommending the GuHong. The GuHong is the best all round cube IMO, it's more "style neutral" than the rest. It's easier to control if you have average to large sized hands though. You might not like it if your hands are small (that's why it's not my personal fav). Once you've mastered the GuHong, you may just want to stick with it as your main. If you want to explore 3x3x3 world, then you might want to consider getting the rest of the DaYan cube versions at some point. They're all good in their own way and every one of them has their own defining characteristics. Be warned that the LunHui is a bit of a hassle to get your head around at first though

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Also consider getting the F-II and the AV-f at some point. Both have the pre-DaYan style mech, but both are very characteristic and nice cubes to own.
Once you get more 3x3x3s, you'll notice that nearly all of them fall into a category related to the above cubes. I place all my cubes into five categories:
- DaYan type feel = DaYan, MuFang, Gans.
- F-II style = Type F(but not including the F-III), GhostHand, CubeTwist.
- Alpha feel = Alpha, YJ, F-III.
- Type C style = Type C.
- Mf8 Legend (kinda like the type C, but out of control). One of a kind, although I recently purchased another
ball-core type cube that feels a lot like it. Not my vid btw
Also; bad, hard-to-turn or locky cubes can cause injury after extended use. As I learned the hard way

I own tons of cubes to choose from, but I'm using the DaYan I as my main at the moment. It's not too forgiving, but nice to practice with. If I ever go to a comp to participate instead of just watching like last time, (I know, the shame) I would use a LingYun.
Whichever cube you get, have fun solving. If said cube is hurting your hands though, then either it's not very suitable for speed solving, or you may just want to rethink your style
Either way, kind regards,
Holger.