Trying to play my first chord G major and no matter what way I try at least one string gets blocked by another finger. Should I be able to do this first time or can it come after a while?

it will come after a while but try to hold all your fingers down angled so no strings are blocked and play 1 string at a time makeing sure no srings are blocked and hold your hand there for a bit. you'll get used to it after a while and will not have so much trouble anymore.

it is like playing sports every player has a ceiling based on
how gifted they are by nature in the required skills only you can prove what or how long it takes for you to master fingering
there are a lot of intertainers that can't acheive accurate
fingering of chords and keep the beat without messing up that is why there are so many guitar players in one band and it takes so many takes in the studio

G major (open position across all six strings, I'm assuming) is not the easiest chord with which to start. I recommend starting with E minor and then going to A minor and E major.

Some encouraging words Mac1 :It takes time,young padawon learner.Ive been playing for 25 yrs and am always learning.What happens is you get the foundation down,but youre always "tweaking" and refinening your technique.I started out on guitar,but now I play my god-given instrument the bass.So be encourage,You Can Do It Champ!!!(I say this phrase to my sons,I think its working). Whassup Scotch,Im seeing you everywhere bro. Be Blessed Yall and Merry Christ--mas !!! Chaz.

Some encouraging words Mac1 :It takes time,young padawon learner.Ive been playing for 25 yrs and am always learning.What happens is you get the foundation down,but youre always "tweaking" and refinening your technique.I started out on guitar,but now I play my god-given instrument the bass.So be encourage,You Can Do It Champ!!!(I say this phrase to my sons,I think its working). Whassup Scotch,Im seeing you everywhere bro. Be Blessed Yall and Merry Christ--mas !!! Chaz.