You can do it! Hang in there. It will be tough at first but you will adjust. I went back to college at 30 and graduated at 34 with my bachelor degree. I am going again now working on my masters. I will be finished in the spring and am glad. It was difficult for me at first but I adjusted and made it just fine.
A great site for APA help is here:
Purdue OWL: APA Formatting and Style Guide
I use it all the time. English will make you do MLA but most of the others will require APA. So good luck to you!!!