Welcome to the village. You can already see that there is a lot of good information and also encouragement here.
So here is my 2 cents of knowledge, blades break, it's the cost of making something beautiful. Heck, Michelangelo had to throw out brushes when they were worn out. If he had an errant hammer blow with a chisel, it was tough to put it back on, you have CA or super glue. It's a whole lot easier to fix wood. If you notice that it gets harder to move the blade through your piece, it's gone dull. It will start to wander and slow you down. Don't wait for it to break, just change it out.
Blue tape is your friend. If your project is getting too floppy or wobbly, save your cutout pieces and tape them back in place (without obscuring adjacent lines) It will stabilize your work and helps when you are sanding the back to remove the fuzz.
Nature is perfect... or not. Leaves, plants, trees, landscapes and even animals have curves, radii and irregular shapes. If you wander a little, it's not a problem and won't be noticed.
Man is hung up on straight lines and sharp angles. If you make a mistake, do it in the waste area, you can always go back and nibble away with your blade and clean it up.
If you are cutting where there are 2 sharp converging lines, cut to the point and then slightly deeper (the thickness of the blade) back out the blade and cut into the waste area to reverse the blade and back into the point and continue cutting in the new direction.
If you notice a weak or floppy piece in the area of your cut, do them first. You will remove the load on that piece especially if the remaining piece is larger.
If you are cutting parallel cuts with narrow strips between them, cut the line next to the piece you just removed. It will also remove the load on that narrow piece. If it looks fragile, tape it back in with blue tape.
When starting a cut on a piece, avoid blending a cutting into a curve or straight line. Start at converging lines or a point in the piece. It will make for a crisper cut.
Don't be afraid to drill more than one hole in a cutout. You can relieve pressure on some fragile pieces.
These are some self learned techniques that work for me and I know the members can add to this list to make you cutting more interesting and rewarding.
Keep making saw dust and enjoy!