GMAT Club question Bank is an exhaustive resource and you don’t need to make any purchases because it has all you need. Purchase only conceptual courses if you need to just to get a crash course on frameworks and question types.
LSAT official material can also be added to the official GMAT RC/CR (skip vocab) and that will do the same job for pattern recognition.
GMAT is a test of biases as much it’s a test of your skills, and the bias patterns automatically energe when you solve the official questions only
That’s my first suggestion.
Next for quant, you can actually take up unofficial material (you have that option to filter in the question Bank).
Start with difficulty level medium, based on your accuracy - if below 80% (out of at least 200 questions), start solving easy. if above 80%, start solving higher difficulty questions.
Don’t worry about speed until you’re in the momentum phase. Just focus on - 1. Approach (how you’re solving - are you recognizing patterns?), 2. Accuracy (are you right for the right reasons or was it a fluke- be honest with yourself), 3. Revisiting (after 2 weeks, if you solve the same set of questions, are you able to identify new patterns?)
Also if you go to my profile on GMATClub, you can see the most liked post which is about how to move up and improve on verbal and there are more links to RCs and other options you can explore.
(For some reason I’m not able to pull that up on my phone, would appreciate it if someone else could just see and put that)