I wouldn’t sweat the details he lists as problems. I showed up at my first high power match with a borrowed garand, no spotting scope and wearing a sweatshirt. I asked a member of the USMC shooting team next to me how many clicks to move the sights from 200-300 yards. After that it was all sight alignment and trigger pull. It all worked out well. As you gain experience you can change all your equipment around but I’d say just give it a try with whatever gear you have. Gotta start somewhere!
cheers-