You don’t want to just jump into Sheiko, especially a program like 37. The volume will be very rough if you’ve been on a Westside program. Do yourself a favor; look on EliteFTS under the Q & A for Eric Talmant.
He gave out a one week reintroduction after some time off and a two to three week transition plan for a rated lifter recently. This will help you ease into the volume and the frequency of lifts.
After that I would do #29 since the lifts are the same as 37 but the volume is less. You can also e-mail Eric’s friend Dave Bates for a personalized program; his e-mail should be in some of Eric’s posts.
I just started this way myself after doing Westside for 3 years and this intro has helped me get acclimatized in a hurry. It is tough but I don’t feel so destroyed after workouts and my technique is definitely improving. You are probably better off underestimating your maxes at first too.
If you can’t find it on there PM me and I’ll send you what I have. Best of luck!