But I need tips to get better

You usually want to make planes or gunships as soon as you can get away with it.

Once you have a fleet of Ravens/Locusts, go after whatever is bombable/raidable that would bottleneck your opponent the most: buildpower, energy, or mexes. In 1v1s, caretakers are typically the juiciest targets if you can manage it, followed by field constructors. There will almost always be mexes you can bomb, which is always good. If it looks like your opponent has been running lean, don't undervalue going after energy either, since your opponent can't soften an energy gap from reclaiming destroyed structures, and it can sometimes be a better starvation point.

In this game, you could have bombed my caretakers at pretty much any point, and I wouldn't have had the buildpower to make anything in time for the second wave. The second wave would then finish off any replacement buildpower I would have made, and probably the Fusion too, if the game had reached the point where I'd built it.