Some ideas for your consideration:

1)Take some time off and do concentrated training at Seminole Lake https://www.soarfl.com/ 3-5 days a week or at another commercial glider flight school until you get the glider rating. You will progress much faster than you will at a weekend only club. Cash flow may be higher, but total cost to get the rating may be less.

2)Once you get the rating, join a club and take the time needed to learn how to soar in club ships with an instructor. This is the hard part and your previous experience in power planes is largely irrelevant. Be realistic in your expectations about how long it will take to learn how to soar.

3)Wait until you're basically competent at soaring before you buy a glider.

4)Start training immediately. April is a prime soaring month in FL. Summer is not so prime.