There is a PATTERNS button at the top of the page that you can check for finding something that looks like what you want. Ravelry.com is a good place to look for patterns, you can specify that you want something easy. Knittingatplay.com has loads of patterns. Whatever pattern you choose, you can come here and ask about it and get any help you need. Happy knitting!
My first venture into a real knitting project was a cardigan for my GS. It had buttons and buttonholes, pockets, and a hood. I did opt for raglan sleeves, that part was easy!
I should never overestimate my basic arithmetic skills.