@sofialo09 I know this is BWF. But if you find some of the exercises too difficult, training with weights can actually be easier for a beginner that doesn't have the required strength to move their body.
If you're having trouble consider some very light weights and substituting some dumbell bench press (can be done on the floor) for pushups, dumbell rows for pull ups, etc. Small weights are pretty cheap and can be good if you find yourself in a position of lacking the strength to really progress in your workouts.
Also, you get strong from working out, but you lose weight by eating properly, so make sure you focus on the priority most import to you and make the other one secondary.
Whatever you do, choose what you can do consistently, in the end that will be the most important part in success. If you need to cut something or modify it for a bit, do it.