Any info you wanna give me!

I am 20 and I was homeschooled my whole life so I didn't get the proper schooling like I wanted. I mainly just learned how to read and write but I won't to farther my life to something that's going to help others I wanna be a rn so bad but I'm so worried I'm not smart enough to do the work or past test i have a fear of going to school for rn just because I don't think I'm smart enough but I won't to make something out of my life and I was just wondering does anybody else feel this way? And I also wondering how does the online program work at southwest I think it is? The 2 year rn? I know it's not all online but is alot of it online? And is it easy to find a job for a 2 year rn or does everyone look for a 4 year rn ? I wanna go for 2 then go back later for 4 year! And one last qus around how much does a 2 year rn make a year compred to 4 year? Thanks for any help u can give me I wanna try to start asap but I'm so scared I can't bring my self to it I haven't even took my act cuz I'm worried I won't pass it! Please don't think I'm crazy for these qus! Thanks so much for anyhelp