Car won’t start after replacing battery

Subaru 2015 legacy . So I tried to start my car
and it was dead. I tried to charge the car with
cable and the horn was going off.( I’m thinking
the anti theft system) so it’s too loud so I
figure I just go out and buy a new battery
which I did. I hook it up and the light on my
dash board is all on but no headlights and the
car won’t start still. I check the most of the
fuses and it looks still good. I couldn’t get the
bigger fuses out to check it... I have a key fob
so I can’t do the crack it three or four time as I
read on some peoples post.... I couldn’t pull
that main big black fuse out to even check it if
that’s the case.