Going from trial to paid version questions.

My new laptop has a 60 day trial of nis. Norton products have had some very good reviews lately so I want to go to a paid verson

when the trial is almost up.I am new to computers.

Do I have to uninstall the trial version?

Is this hard  or complicated? I have heard that past versions of Norton were bastards to get rid of. If I have to take it into a shop and pay to

get it removed I certainly wont pay to have another version. 

Should I use any other protection eg malwarebytes to compliment Norton?

Do I need to?

thanks for any help.