Background: I have no grappling experience, I have just a couple years of Wing Chun Kung Fu under my belt, which is predominantly efficient striking and touch reflex / sensitivity only, with a lot of clinch range work but minimal sweep, throws, and locks. Judo intrigues me and I think it could complement a striking art very well, even just for self-defense. I found a school that is only minutes from my house, led by a 2nd Dan Sensei and part of the American Traditional Jujutsu Association. They do very affordable per-class pricing and have class times that seem like they'd work pretty well for me, so I feel like I could give it a go and see how I like it, and take a break from my Wing Tsun which from a money, time, and travel standpoint actually has been challenging (there is growing pressure from the wife and I might need to take a break when our next child comes soon). Since my fight training so far is pretty limited to being upright and striking, I think I like how Judo could maybe stretch me in terms of learning to fall, use different stances, footwork, make me more rounded. I'm a big guy, 6' and 240 pounds (though I would like to lose 20-30). Is being a big a problem in Judo, making it harder on training partners or anything? Is taking a 1.5 hour class once a week more of just a fun outlet, or can it build actual skill even if pretty gradually? Is there anything I should be concerned about in terms of what to look for or avoid?