Have you ever jump competitions barefoot on grass and what are your tips? I’m only used to sand, and I'm going to do this on Sunday, it’s gonna be a hot day, the grass is short and dry.
Just make sure you don’t take any tight turns and try not to go to fast, if you keep that in mind you will be absolutely fine
How do you memorize your course at a show, and what to do if you forget part of it midway jumping?
I would take my time during the course walk so you can memorise the course multiple times. After the course walk watch as many people go as you can, it will help you remember as wel. If you after that still forget the course half way through, courses are usually really predictable so just keep yourself calm and look around in the direction you think the next fence will be. That way you still might be able to pick up the rest of the course
How do you help a horse to go straight and calmly towards a jump?
I would lay some poles on the ground in a straight row . Put enough space for one stride between each pole. Try to galop the poles with a consistent rythm keeping the horse as straight as you possibly can. I have done this with multiple young horses and to me it was very effective. I hope it will be helpfull to you as well!