To be honest, I got involved in gambling because of environmental influences. Most of my friends were quite active gamblers, which gradually influenced me, and I became curious enough to join in. There was no coercion, pressure, or threats from anyone to gamble. I think most people have similar experiences, namely, environmental influences that lead them to gambling.
By the way, I started gambling around my 20s and am now 23, meaning I've been involved in the gambling world for three years. Fortunately, I'm in a responsible gambling environment. Many of my friends always remind me to only bet small amounts, so I haven't experienced any problems as a result of gambling.