Unsure where to begin or how to dive in? Start with what’s accessible.
One of the most difficult predicaments is to not know where to begin. Sometimes you see too many possibilities and get stuck trying to decide, while other times you see no starting points at all.
For your practice of meditation, I generally recommend bringing awareness to breath and/or sensation. But some days the breath is not so approachable. Sometimes sensations are too vague or too painful to anchor into. So, the best advice I can offer is to go with whatever is most accessible. If your stream of thoughts is most accessible, follow it. If your right shoulderblade is speaking, listen in. If the breath is steady and receptive, start with that. If what’s most prominent is your uncertainty, well, that’s something too. Where you begin isn't as important as you might think--you can sing any song beginning on any note.
So go there. Then simply observe what next unfolds. It’s important to acknowledge that just because it doesn’t seem like something is happening, doesn’t mean something isn’t happening.
Best of luck.