honestly, only 2 things you can do to get what you more or less need. either A, hire someone(price always negotiable) or b, do it yourself.
since you said you cant afford it, look at students or recent graduates. theyre always cheap lol.
Wp as a CMS, is pretty basic compared to other CMS outthere so …dont be afraid to log in and change a few things around.
if you have access to your server (where your site is being hosted) duplicate ALL the files in the root of your wordpress site, and save locally, this way, if you mess up, its only a matter of drag n drop to fix it to what it once was.
if you want to go a little deeper, id suggest BASIC html/css lessons..you can find these ANYWHERE now a days. if dedicated, within a few days youll understand some of the dealings that go into putting together a site and can help you in creating yours.
good luck.