Is my son having speech delay ?

My son just turned 17months, so far he is only able to say 2 word accurately, he understands basic command and able to point to the things we talked about, my family members comment that he is having speech delay as most of us in the family able to speak 2words 14months onwards..it’s getting me worried.. we are taking care of him at home, and only plan to send him at N1, speak to him daily and also read him books often. should I seek any help, if yes where can I go to? Any advise on this? Does going to school earlier helps(2-3hours playgroup)? Thanks in advance