Start lower density, like 55-60%.

Send in a hair sample for a good color match.

See if you can find a stylist in your area to work with, makes things a lot easier in the beginning.

Try to match your current hairline as closely as possible, then you can slowly improve it.

You'll have to grow out what you have a bit more and go a little longer on the piece to blend properly. You don't want that "line" where the system meets your real hair.

If you use a good strong tape, you'd have to seriously hurt yourself to take it off abruptly.