@Kojikun I don't share the gospel in a traditional way myself. I'm not sure how old you are, but getting over that fear and anxiety even in online interactions will happen eventually.
What does spreading the gospel mean to you? For me it means living out my faith and being on the lookout for open doors. Does that look like street preaching for some? Sure.
Or it could be chance (to me) conversations and some of them might lead to effectively gauging how to navigate God, the bible and then the messiah. I don't lead out with Jesus, he leads me in if that makes sense.
Don't feel pressured by the enemy to witness or you aren't a believer. That's coercion. Do you really think the Lord is coercive? A believer is a light and will witness just by being who they are. How could you possibly share the gospel in swahili? What purpose is overseas missions if you don't know the language? We all speak a shared language, people are hungry...don't hide your light, but neither discredit it by assuming overmuch about what sharing the gospel means. Sometimes it can be just an act of kindness that opens a door in a way that talking about Jesus right off the bat when someone is depressed and angry (or hurting) will only push them away.
If you are a evangelist that's one thing. This is a gift and not everyone has it.
I say all this from personal experience. I too have been guilted by this very thing...there may be some truth in it, but please don't listen to the accuser in this matter. Neither accuse yourself, but submit it to the Lord and trust him. He will make your paths straight...
I'll admit that it does get irritating to see so little fruit in my life...but to others maybe they see a lot. In fact, some conversations I've fallen into have baffled me how deeply rooted my faith is, even when just prior I may have been giving audience to doubts. I'm 29, it's taken a while to see anything like this happen. Who knows what is yet future?
Don't beat yourself up. I have, and given audience to this type of thing...it doesn't lead anywhere productive. There may be some self-examination to be done (usually is for me) but don't do it under duress. Jesus didn't start his ministry publicly until he was 30 neither did Joseph go before Pharaoh. Some people start young and some late, that doesn't "always" indicate something negative.