Coach Pendlay vidoes
Q&A with Pendlay
now I would say:
IF you are training OlyW once a week, ain't gonna cut it. I suggest you lift twice a week.
Remember OlyW is a strength sport, yes techinique is important and it takes time to learn, but it take longer to build up strength. For real bigginers my coach has them do the OLifts light to learn technique and THEN squat/RDL heavy to build strength. Overtime and with consistent training, the new lifter will do the OLifts with heavy weights and squat with heavy weights.
In your case since you are new, you cannot start doing the OLifts heavy because your lack of technique will get in the way. And one a week is too infrequent. I suggest two days because on day 1 you can do light snatches (like in the videos) and then front squat heavy. On day 2 you can do light cleans and back squat heavy. Once your technique lets you lift heavy weights, you will be able to snatch/clean heavy and then front/back squat heavy.
p.s. I know its hard for you in MMA but you gotta eat bro. Squats and weight loss DO NOT MIX.