What should I do to prepare before a fight with a bouncer who has some weight on me?

Hi all, hope you’re doing well. I come to you requesting some advice for a fight I’m going to be a part of in a few weeks.

I recently came into a lot of money and have decided to use it to open a bar. I’ve been an accountant for over 15 years and have been dreaming about owning a watering hole for about 14 and a half of them.

It’s been a slow process, as I’ve been converting an old corner store. So first I basically demolished everything and then started been building it back up. I’m going for a really specific and unique “vibe” for the place, so I’ve been trying, when possible, to get my materials and decorations from my contacts in the underworld. However, I had a really bad experience a month ago: some guy on the deep web told me he could get me a mine cart from an abandoned coal mine. I really fell in love with the idea of delivering drinks to people on the mine cart, so I foolishly sent him a ton of money. Never heard from him again.

I’m a bit traumatized from that experience and I’m trying to avoid getting swindled again. I’ve been looking to hire a bouncer more recently and because of the mine cart ordeal I’ve decided that whoever I hire has to be able to prove their capabilities by beating me in a fight.

My first round of combat is coming up in a few weeks and I want to come at him with everything I have. He’s got a huge physical advantage on me (He’s 250 pounds, I’m 145 pounds; he’s about 6’ and I’m 5’10”) but I’m very fast and agile from my experience as a gymnast. I’m also a green belt in taekwondo, which taught me that size is certainly not everything.

I’m looking to supplement my experience with some training I can do on my own, or (not preferred) with a paid instructor. Reminder that I only have a few weeks so any expedited courses would be appreciated. Thanks!