It doesn't look that bad. If your grip strength isn't a concern you can use straps with double overhand to get used to keeping your arms straight. While doing that think of your arms as cables and maybe it'll be easier to keep them straight when you switch back. Make sure your grip isn't a limiting factor though.
You do sit for awhile before actually pulling. One thing you can try is to fully extend your legs and round your back right before pulling. Then pull your hips down while keeping your hamstrings tight and get your back, abs and lats as tight as possible while shifting your weight back. Once your shoulders are over the bar, leg press the ground away. Everything should feel tight right before you initiate the lift.
If you make any changes, it's probably fine to try it over the next few weeks. IMO, you shouldn't make anymore adjustments when you're a month out.