Hello brother/ sister. Welcome to our online family!
Your desire is that of us all who love Jesus and want to reach the world with the gospel of grace. Yes, in some countries it is not easy to do evangelism. I was in Turkey for awhile when things were better than they are now, we need to be wise in how we work where it is against the law to preach the truth. We have a lot in common with Muslims which give us an opportunity to share common truth.
I believe God has given us the ability to reach into these areas with the internet. It is not possible to reach all, but we can reach some who then will extend the truth to those they can reach. We have been reaching into China. We do not know who has been reading, but we know many have. We continue to plant Seed and pray that God will water it.
It is our prayer that God will send workers into His vineyard, for it is white and ready for harvest.
It is most important that those who do evangelism be grounded in the true gospel. Many, so many are not. Thus, how shall those we are seeking to know the truth find it if their teachers are as deceived as were the Jews when Christ came to His own and His own knew Him not? Sharing Spirit of Prophecy books is a great idea!