As far you have no experience then before visiting a gym I recommend you visit a doctor who will say what you can do and what can't. And I'd advise you choose a more expensive fitness club. They have better coaches who can teach you how to use all the exercise equipment. If you don't have enough money consider taking a loan
https://www.everyday-loans.co.uk/bad-credit-loans/. For a beginner, it's a valid strategy.