It's always exciting to hear someone eager starting out. The only secret is to keep being interested and not give up on yourself. If you're looking for a fun problem to solve, try writing a brute-force sudoku solver. That could be fun in the context of a webapp. I'd also recommend getting a solid grounding in SQL and designing schemas. You can do a lot of this by brainstorming applications and then working out how you'd design the schema. You don't actually have to write it, and the process can be a good way to get a feel for whether an application will be simple or hard.