Great first analog sketch post! Totally agree with Michael, just keep practicing and posting to build up the muscle memory. Don’t be afraid to take a stab at a sketch and then fix it with an overlaid sheet on top of your first sketch.
When I’m frustrated, it has always helped me to go back to straight line exercises and ellipse exercises. Warming up with a few sheets of each before a sketch helps a bunch too. Sketching a bunch of basic solids like cubes and cylinders is also good exercise. Since you’re just getting back into analog, you could try switching back and forth between exercises (25 or more sheets front and back) and the next day a few sheets of concepts, setting a pace that challenges you but is realistic. Also, maybe you could post your first sheet and last sheet of exercises to see how you progressed in one day! Just some ideas.
Keep it up!