+1 for Bernard’s post.
For fine work you need fine blades – I mostly use 5/0, sometimes 8/0, and occasionally 2/0. Small blades are easy to break if you tilt them sideways, so that’s the first discipline you have to master. The second one is keeping them vertical when turning sharp corners. I suggest holding the saw handle with your fingers rather than your whole hand, that way you are less likely to tilt the blade sideways when rotating it. Be gentle with it.
Keep the blade slightly lubricated – the traditional lubricant is ‘nose-grease’. Wipe your thumb and forefinger down the sides of your nose, then wipe them down the saw-blade. Nose-grease is free and always available. Use it as soon as the saw starts to drag – it’s remarkable the difference it makes.
For intricate cuts, I draw or print the path on paper and stick the paper to the metal with Pritt Stick. I saw on the line – not to the side – the blade is about the thickness of the line. The fine swarf is very good at hiding the line, so blow it away frequently. The Pritt stick is water soluble.
The rest is just practise – and buy lots of blades.