So firstly:
Push back the cuticles and cut them off because if they stay on then the gel will chip where they come in contact with each other and you don't want that!
Then secondly:
File down the nails so they are not smooth- the gel will not stick properly to smooth nails.
After that:
Glue the tips on (if you want to do tips that is) and file them down too so the gel will stick to them. Cut them to the desirable length using a nail cutter.
Then:
Paint the gel onto the nails by using a brush and then put your nails under the uv lights for about 5 minutes before repeating again for another 5 minutes with another layer.
After that is done put a uv topcoat (under uv light for another 5 minutes) and this should stop the stickiness. On top of that put some nail oil on the nails for finishing off them.
I never took a picture of my sisters nails but here is a picture of mine to show what they will look like at the end:
And that is it, simply as! I hope this helps people!