Don't go nuts now and use a heavy grit tape.
If it's to gritty say....under 100 grit, it makes it very difficult to ollie, do flip kicks, or reposition your self in general on the fly. 100 - 120 is a good medium in my experience.
I would install 120 grit if it were me though. You can kick your foot out easily and still get a good plant, and grip on the board with 120. Its a good all around grit for street and ramp skating. Speed skaters and down hill may like 80-100 better. You can't go wrong with 100 - 120 grit though for street skating.
You can cut small logos, and designs in it as well but make sure you have enough to cover the entire deck. Some people like to leave a gap in the middle of the board but all that does is create a nice slip area to bust your arse on
When you mount the tape
don't cover the bolts. You want the bolts holding the trucks on to go through the grip tape. Just puncture the tape from the bottom after mounting and slide the bolts through. If you have a convex board and run in to trouble mounting your tape its an easy fix. Just cut slits in the tape and trim it to flush up with the adjoining section around the nose or tail of the deck where its convex. ( not the length of the deck, just enough to get rid of the binding around the nose and tail ) If you muck it up on the 1st try just use a hair dryer and it will peel right up.
Happy to help
