Sigh.
In my opinion, it's a bad idea to start mapmaking with SP levels. To pracitce open areas and such, I feel you need to make multiplayer maps first. You really work your way up if you start that way, and honestly, SP maps are the hardest to make, because they are very complicated. There are many aspects of the level design that have to make it playable, and it's almost impossible to get it right if you actually start with SP.
Flat, boring, cramped, supermegahigh walls. Bleh.
You don't start by making mods, and that's a bunch of peoples' mistakes.
Ever heard of, "Slow and steady wins the race!"? Start off small, and you'll be fine.
0/10