I hope you are having a great senior year! The answer to your question is not simple, however I might be able to give you an idea of what to expect. I am going to write it as a list of steps to hopefully make it less confusing.
1.) Apply to Delgado
2.) Register for classes (either summer or fall): Most importantly Biology 141 with lab and English. Generally, it is best to wait to apply to Charity until you have completed AP1 because it gives you more points on you application and you cannot take AP1 until you take Biol141.
3.)After Biol 141, Take AP1.
4.) Take the HESI exam.
5.) Apply to Charity. Applications are due in January for the following spring and September for the following fall.
While you are doing all this and waiting to start after getting accepted you can take the rest of the general ed and pre-reqs. Some of the classes need to be finished before you start and some don't, but most people finish all of them before they start at Charity. I am in my 1st semester at charity and am soooooo glad that I can concentrate on nursing courses because they are very challenging. If I had to take math right now, I wouldn't sleep and would probably have a nervous breakdown. I hope this helps!