Hi
I don't have any experience of Simplilearn, but with regard to your question about the courses to study - there are many combinations and your current role and desired future career path will affect what you choose.
As a rule of thumb, lifecycle courses are suitable for those who will manage/implement processes, and capability courses are suitable for those who will work with processes on a day to day basis (more focus on process activities).
You can take a mixed track which combines the two or stick to one track. Use the credit profiler here:
http://www.itil-officialsite.com/qualifications/creditprofiler.aspx to help you decide.
Kind regards
Claire