Career change in mid-life

So this past week I decided to take online classes to make a big career change in the near future. I have worked hard physical jobs all of my life. Now that I am older and started having health related issues that go along with hard labor (arthritis and nerve pain clear down my left leg), I realized that I need to start taking care of myself more and I do enjoy being on computers and such. So I started taking classes for data analytics. I admit that I am a bit anxious about this. It's something totally different than I'm used to and I'm scared I won't complete my schooling. I'm still working at my job which hours fluctuate as a housekeeper in a hotel. I also have to care for my husband that has been very sick for most of this year. We're about to get his kids back into a routine with us this coming week all in while as I try to squeeze in some time towards my courses. I'm also a mother to 3 grown children and have 4 grandkids. I want time with everyone but I also need to finish the task I started. I'm trying hard to keep my goal, that goal is to complete this course and get a job in data analytics.