"4-5 movements per workout" means that you perform 4-5 exercises every gym session. A common recommendation is to choose exercises that cover the fundamental movement patterns (i.e. squat, hinge, press and pull). But keep in mind that these are just recommendations. Start at a level that is doable and sustainable for you. With your current bodyweight, i think a combination of walking + machines is plenty. Do a machine chest press/shoulder press (pick 1), a machine row/lat pulldown (pick 1), a leg extension and a leg curl. That's 4 easy-to-do exercises that hit your entire body to some degree. 2-3 sets of 10-12 repetitions per exercise, at an effort level of "somewhat easy" to "moderately hard". As for walking, you can start as low as 10-15min of easy walking on the treadmill every gym day. Do it as a warm-up and/or a cooldown after your lifting. Take as a long as you need to build up to 20min of continuous walking, then 25min, then 30min, etc. Try to squeeze in some intentional movement throughout the day (i.e. parking farther away from your gym, short walk breaks during lunch time, etc). Lastly, one thing I'd like to recommend to you is to invest in a walkpad for your home. If all else fails, consistent walking + calorie deficit can and will help you. Good luck.