The workouts are flexible. Make them your own.
2-4 days a week is enough. Don’t feel you have to work out everyday. Recover days are essential for muscle growth.
Try to sustain the same weight for all your sets on that particular workout. If you’re successful, the following week when you do that workout again, try more weight.
If you fail, try the same weight the following week.
Ensure you are getting full range of motion. Watch yourself in the mirror, film your movements, or ask a friend for feedback. Full range of motion trumps any weight selection.
Keep the abs engaged, chest lifted and open, back straight, and your spine neutral. Always allow the joints to be soft and keep your knees behind your toes.