2003 Chevrolet Venture Altinater

I am low practiced mechanic. Apprentice level. I do most of my work on my own equipment limited work. Which is enough work able to do more. 3 bolts on the altinater. No straps. No cherry picker. I have rather large four arms and long plus a big gut. So accrobates are out of the question. Flexibility is limited I have reach and nimble fingures and strength. Any ideas. On an easier way to remove my altinater to replace it?