No. You don't need RCS. It doesn't help you unless you're nearly bang on, and main engine burns are far better for adjustment.
no ill crash if do im terrible at suicide burns
Then don't do suicide burns.
well look at this i got on and did my suicide burn but I'm terrible at landing a specific point it just pulls me off
so is there any tips to be on target?
In atmosphere, it's mostly trial and error. Every craft reacts differently because they have different drag co-efficients and different thrust to weight ratios so what works on one rocket, won't work on another. The angle you're coming an at, the speed you're approaching will also be different every single time you do this.
Coming in shallow also has a different technique and approach style than coming in steep, and both have their pros and cons. Steep tends to be more accurate, but is
very expensive delta v wise.
Mark the area using some sort of drone either side so you can see where you're aiming for and then keep practising. I know that's anathema to some people, but it really is a simple case of doing it until you get it right.
Have you watched any videos on here of them being done? I have videos of multiple precision landings being done on Earth