Start small and don’t dive into the deep end. Do that and you might find sticking to it easier. When you’re a complete beginner the bare minimum amount of work is enough to start seeing results in a few weeks/months.

Only go hardcore blood and guts later on if that’s something you really want. Willpower/motivation is a finite resource, so making exercise absolutely miserable from the very beginning is a good way to fail after a week or two tops.