Your question is quite common and this is something first-time entrepreneurs often struggle with. I would suggest you divide your question into two parts:
- First focus on something you are passionate enough about so that you can really commit and dedicate enough time on the idea. I find that execution is often related to well the idea you are working on is aligned with your passions
- Secondly, try to be systematic about the ideation process. You have already listed a few things in your question, but you need to enrich it with more insights, not only on the pain points but also on trends and evolving consumer behaviors. There are then various tools you can use to take you through ideation.
To sum up, set a strategic focus, and align it with your passions, get as much insights you can on the focus area, generate ideas, refine and develop paper concepts. Go into validation and iterate from there. I hope this helps.