Hey @Colin Yang, great question!
I think @Kevin Dean hit the nail right on the head. Talking with most people doing deals in my markets, they're looking for off market deals, capital, or a real HNW individual to help qualify for a loan.
In my experience, most of the people doing these larger deals already have full time analysts constantly looking at markets and deals, so unless you have a degree in real estate or experience underwriting and making projections, that may be a hard way to offer value.
I think the best thing you can do is network with people in your area doing the things you want to do, and offering your efforts for some hands on experience. Also, linking up with a mentor or coaching program, specifically for multifamily, can drastically help. If you go that route, I'd recommend someone who has a track record, shows good character, and has a large community. I am part of such community, feel free to PM me if you want some more information.
Hope this helps and much success,
Nick