Hello and praise God you want to find ways to share the gospel!
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I would recommend starting with online witnessing. One way to cautiously and thoughtfully do that, without being banned off facebook or put in social media jail, is start a blog that has answers for a particular objection or response...(and include links to reputable resources [linked at the end of the page] like living waters, str dot org, evidencebible dot com links, coldcasechristianity yt playlist answers, answers in genesis yt playlist answers and or links to any of their websites answers, etc, and always includes needGod.com gospel link. Then you can say something light in the comment section, and then drop the blog link there.
Once you do well with that, or feel confident enough to answer a few typical questions you repetitively see online then, you can test yourself; ask a trustworthy Christian friend to role play with you at home, & then outside at church after service on campus, then in a cafe, and then outside at a park or some random outside place you might approach an unbeliever. Then you will gain confidence.
The good thing about today is, even if we dont know the answers right off 😃 we have online resources we can "air drop" to them or text it to them; if we have those resources handy.
So when you create a blog, make sure to keep a table of contents page updated, organized by category sections. Then you can keep a webtab open for that page, and use the browser feature "find on this page" to search keywords quickly, to snag that page link (to share). Anytime, any convo.
For the youtube (yt) stuff, save the answers in a playlist on your youtube account, set to public or unlisted, then you can also share the playlist with other Christians to help them do the same.
Bonus: you can share FAQ Christian posts on your social media either publicly or to your friends circle. And you also leave your blog answers, yt playlists, and fb posts behind for your family, friends, and children/grandchildren to get answers there. [Esp if you tell them youve started a Christian blog.] *>You can also PIN a post to those links on your facebook wall, and anyone going to your page... will forever have those links to access.
For the blog, you can ask a few solid mature believers at church (or in the family) to review the wording of what you write when you post it, And after consider if you should adjust it or add something they noted as important.
If you spend some time every day, going thru these resources and ministries (for faq) and arming yourself with more biblical knowkedge, you will be out there sharing the things of God more confidently (while praising and glorifying God too). Remember to be in the Bible daily, as it will be a great help to you in witnessing, but also in closer relationship with our Trinune God.
Resources
Answers for Progressive "Christians"
Answers for Christians and "Christians"
Answers for cults and false religion groups
Links to reputable ministries and resources for Christian answers
Living waters, evidence Bible answers, blog search, youtube, podcast (link to individual podcasts)
Stand to Reason website youtube (see playlists tab)
Cold Case Christianity website youtube (see playlists) books seminar videos & video courses
Answers in Genesis website Youtube (see playlists)
Grace to You Questions & Answers verse search A's
StudyBible.org (resources incl Q&A and verse answers)
Random various good helps for sharing or knowledge (a playlist of videos)
Top 10 common objections answered
Testimony sample (coming soon)
You can copy any of these links and material from these blogger posts and put on your blog. You can also just link to them.
Blogger.com lets you create a simple, easy, free blog.