Not everything you did was wrong I commend the fact that you're trying to promote Bitcoin in your locality by inviting people to invest in Bitcoin but I see so many flaws in your approach.
Acquiring Bitcoin is a easy thing but keeping it safe is the job in it. I'm guessing you just showed your friend how to complete some certain transactions how to receive Bitcoin and some other stuffs but you didn't get to teach him how he's going to keep his Bitcoin safe like what type of wallet to use, how he's going to select the type of wallet he wants to use, and some other security measures he should take in other to prevent the device that he's using to keep his coins from getting infected by some malware or to prevent his device from getting hacked.

But, I just hope he gets to learn about all these stuffs before it's too late and since you already recommended this forum to him I hope he registers an account fast and start his learning process as soon as possible. The earlier the better.