You would not buy a car without a test run and we would not expect you to become a member without trying the game of bowls first. Just ring the club and arrange for your visit. You might have to leave a message for someone to ring you back to arrange a convenient time with you.
They will show you around the club premises and help you bowl your first bowls, from this meeting you might decide to join immediately, book in to a 6 week coaching course or ask if you can attend a few more times before deciding if bowls is for you.