cashing out .5 btc

i have almost $25,000 in btc that i’m looking to withdraw from a gambling site, and i’m hoping to avoid only platforms (like venmo for instance, as they are currently holding almost $8,000 of my btc hostage and have been for several days now). are there any secure, brick and mortar places that could facilitate a sale for cash? or any attorney or transaction specialists that could handle such a thing? i’m not looking for p2p because it’s too sketchy. let me know please.

EDIT (UPDATE) : i ended up using coinbase, thank you to everyone who recommended that and everyone else who suggested other platforms. i was hesitant to use them because i owed them about $800 from late 2022 and i figured my account was banned, but when i logged on it let me transfer bitcoin in to repay the debt and instantly restored my account. then, in three separate transactions, i transferred the total of $25,000 into my coinbase, and coinbase literally let me sell all of it and instantly withdraw all of it to my bank account (for a pretty little almost $500 fee, plus the almost $800 i owed them from 2022), but still, so happy. entire 25k is in my bank account now. about an hour later i log on and see that my bank deposits are disabled on coinbase now. maybe high activity flagged something in the system that led to a freeze for deposits and withdrawals (haven’t tried to withdraw anything because i don’t have anything in coinbase left to withdraw) i don’t really care since i already instantly withdrew everything on coinbase. just thought it was weird and worth noting. now i’m just hoping venmo doesn’t f me on the $7,600 i withdrew a few days ago and they subsequently froze, and then hoping i can repent for my gambling and live the rest of my days as an avid church goer and happy child of god. (joking but serious). this was a good win for me but i would definitely say i have been a problem gambler and i would like to end on this high note. thanks for reading and for the previous suggestions