The basics are
Step 1. Get your own affairs in order, Christianity was twice as hard for me to get into because one of my main experiences of it was a very dishonest and manipulative East Orthodox person. Likewise you if you do bad things and live a bad life people are going to assume your truths are equally as twisted. Fortunately the converse is also true.
Step 2. Learn the doctrine and answers to common questions and objections, giving bad and incorrect information is worse than doing nothing at all.
Step 3 - look for opportunities wear a cross openly, interject when people start discussing religion etc.