My mom was diagnosed with Lupus when she was 26. She is still an RN, and is actually graduating with her DNP at the age of 60. My nickname for her growing up was "supermom", lol.
She does very well with keeping things under control. She is on about 20 medications and takes them on a timer, religiously. If she gets symptoms of a flare up she starts on a low dose of prednisone and that usually gets her through.
She's only ever been hospitalized about 3 times in my life. One time she had to have a toe amputated, and one time for angioplasty. When I was a baby she was in the hospital for a bad flare up but this was in the early 80's and I'm sure treatment options have changed a lot since then.
Since Lupus can have really different symptoms depending on what systems it's affecting, you really just have to listen to your body! I definitely think that good nutrition and getting in your exercise is very important as well.
I honestly think you will do great