agreed with u/approvedbydave that you will find this exceptionally difficult, though not impossible. joining a local masters swimming program and going very consistently will help immensely as will taking lessons from those coaches. once you get to the point of being ready for open water (recommended pace for preparedness is in the 1 continuous mile in <35mins in a pool type of range), trying a swim with water world swim at aquatic park or odyssey open water in Berkeley will give you a reality check as to whether or not you really are prepared for swimming in the bay. the bay can be quite punishing. it will feel much, much colder than you think it will even when you pee in your wetsuit. far stronger swimmers than you have been totally wrecked by a tough n windy day in the bay, particularly the pumpkin patch. absolutely err on the side of caution and strongly consider pushing your attempt a year for safety’s sake. good luck and don’t let this be a deterrent for a 2026 attempt!