Replaced engine my self and it's alive!!!

So my engine blew in February this year, sat for a while as I searched for an engine, found one on Facebook, was still in the car and running perfectly so I bought it, he took it out and sent it to me the following weekend!

I have never done anything like this before, most I've done before is change breaks a spring and an alternator 🤣

With a little help from my bro and the Mrs we got the engine in and I finally turned the key!

Runs like shit right now...

Also question!

My clutch pedal just sits on the floor now, can pull it back up with my hand, it has zero pressure, any ideas what this could be? I changed the engine and gearbox all together.

Thanks!