You should be able to get on to level 1 anywhere. This is almost a garanteed pass, if you dont pass this one i would suggest not bothering with coaching at all. However, YOU WILL PASS so dont worry.
Level 1 is very basic, teaches you about some drills and concentrates mainly on youth football. Level 2 is a totally different kettle of fish, Level 1 doesnt prepare you for it in my opinion.
Like it has been mentioned, your footballing ability is not the main part of the courses, it has nothing to do with Level 1 anyway, level 2, I would suggest brushing up on some technique and practicing certain things with the ball, this is just so you can demo better. However in "real football" its well known that you can always get someone else to demo for you. So no worries there.
If you are already coaching, you will probably find level 1 is not testing and also you only learn one or two things you did not already know. All the same, more and more places are expecting you to have your level 1 now as a minimum requirement to get onto level 2, and i would suggest taking it. Also you get your emergency aid certificate and child protection (which are needed for level 2).
Good luck and keep us posted on how you get on. You should be fine.