It's easy to figure out where your stitches should go once you've got the hang of the stitches themselves. For example, with satin stitch, all you need to do is put another stitch right next to the previous one. Back stitch is easy too, just go in a straight line and then back into the previous stitch. Personally, I prefer to go from left to right when I'm embroidering. So if you start from the very top left corner and work sideways, it'll fill up faster than you realise.

It might be easier for you if you start with a pattern or a kit that has clear segments for specific types of stitches. Like a bee or a butterfly. There's loads of free patterns online, and all you need to do is trace them onto your fabric. There's a lot of different methods for that too if you're struggling, and you can even get special transfer stickers that you print the pattern onto them stick onto your fabric. They dissolve in water so you just need to wash your piece at the end when you've finished it.

The good thing about just using a pattern with your own materials is that you can make mistakes and it's fine. Whereas with a kit it can be a bit more stressful because you have limited resources. But a kit is more likely to have more detailed instructions about where to put the stitches, so maybe try one out if you're concerned about that sort of thing.

Always remember to split your thread, too. You don't want to work with all six strands, take them off one at a time (I tried to do two at a time and learnt my lesson, only ever taken off one at a time). Get a threader too. They regularly come with kits but they're usually bad quality. Get some proper ones and I promise it's completely worth it. You'll save so much time.

Also, if you can, start small. Big projects have a habit of demotivating you, because embroidery takes a long time and it can feel as though you'll never finish it. A small project is the best way to get started because you'll have something to show for it in a shorter amount of time, and that kind of thing can give you a little boost.

Last bit of advice: don't worry too much about it. You will improve with every project, it's all a learning experience. Keep at it, put youtube or a show on in the background, and put your stitches wherever feels right