Going a bit off topic here mate, but I cannot re-emphasise enough what Bm101 just said. You must be absolutely certain that your saw is going to cut square at full depth, each and every time otherwise, when you try to make your bench legs you'll end up smashing (or wanting to) it to bits with a hammer. Even a tiny fraction out will result in wobble that will be a real pain to correct, if not impossible with only a circular saw. Due to blade deflection you'll likely not be able to simply trim off fractional waste.
What are you going to use as a fence to make the cut? You can't do it in one pass with a 50mm depth of cut, so how will you ensure the position is identical (to a half millimeter really) for the subsequent cuts?
The blade itself is less important than these considerations when it comes to table leg ends, I'd argue.
The correct tool for the job is a table saw really, or a bandsaw with say a 3 or 4 tpi 3/4" blade, but both need to be set up perfectly. You might be better off asking if someone local would make these cuts for you? That would be my suggestion and we're a friendly bunch on here. Just until you get your new bandsaw sweet.
And check your saw and blade is square with a decent square not the machines angle setting unless you have a really good saw. Apologies again but it might save you some grief if you're starting out like me.
