You need to try and snap on every singletap, even if the notes are very close to each other. If every bpm feels the same, then just try some streaming maps, and see whats your maximum. This will give you an idea of what you can and can't do.
Playing hard stuff is okay, it just depends how hard it is. To train consistency just pick a map where you think you can fc it, and play it 1-2 times a day, or whenever you want, just not 10 times in a row because that's training your memory rather than your consistency.
If you think your consistency is alright, try to achieve new heights, find maps which are a bit harder, and play every hard map on a similar level 1-2 at maximum a day. These maps are stuff which you B-rank or almost A-rank. You don't want to just pass hard stuff, you want to get consistent at it too.
But now it depends what should be harder on the map? The speed or the distance between notes? That's completely up to you, but if you want to practice long distances then go with a bpm you can easily stream and follow, which is usually 150-190, because you have a lot of time to aim between notes. If you want to train your speed at aiming and your speed in your fingers to tap, then go with a mediocre spacing which you already are consistently good at, and just have it at a higher bpm, whether you find a new map which is similar, or edit an old one to increase its bpm is, again, completely up to you.
Another thing is: don't try to practice too many things at once. Stick with an approach rate with which you are comfortable with, a bpm with which you are comfortable with, and then practice aiming. If you want to practice streaming, go with a comfortable ar and a comfortable spacing between notes. I think you get the idea.