Are Infant self rescue (ISR) swimming lessons worth it if you don’t have a pool?

Maggie • Irish twin mommy💙💗

I’m looking into them for my 10 month old. We don’t have a pool or plan to be around them too much. But what if we do decide to go? Ugh I’m such an anxious person. They are $100 a week for 4-6 weeks with a $100 down payment. We may go to my aunts pool a couple of times. Any one have any experience with these lessons? Thank you!