Paragliders launch from a gentle slope and then just fly away. You don't need a boat or have to jump out of a plane. This shot was taken in the French Alps at a well known site with a purpose built take off area. Paraglider launching
Paragliding student makes early morning flight Students are taught under very calm and controlled conditions by Instructors who have lots of experience and have been through a rigorous vetting system. In this picture a student makes a high flight in the still air early in the morning before crowds or thermal activity

Learning to paraglide

The BHPA are the controlling body for Paragliding in the UK. Their web site has a list of schools and clubs near you.

The two nearest paragliding schools to me are:

Green Dragons in Woldingham, Surrey.

Sussex Hang Gliding and Paragliding near Lewes in Sussex.