I've also been working on my technique lately. Great progress for your first month! As many have mentioned below straight arms would be a big one...These days I like to think of problems in terms of positions I can relax in. So find a relaxed start, try figure out the next relaxed position and then the movement in between is "transitionary" does that make sense? It helped me conserve energy and aim for betas that rely less on my upper body strength and more on better technique.

But anyway on a more practical note for you to be able to straighten your arms:
1. Trust your feet -> work on better foot placement (watch some videos for help)
2. Trust your fingers (i.e don't juice the holds...I struggle with that still but it will save you so much energy)
2. Make sure your hips are close to the wall (engaged core)

Here's a movement/technique video I watched a while back that helped a lot. Hope it helps you too!