https://christianity.org.uk/ website with lots of links, topics and things to explore on spiritual questions.
https://www.rzim.org/watch lectures on a range of different topics around faith, world religions, science, moral issues etc. Nabeel Qureshi (one of the speakers) is highly recommended
https://benjaminchangblog.com/ good blog by scientist and Christian by Benjamin Chang, with blogs, articles and videos on a range of topics
https://www.reasonablefaith.org/writings articles by William Lane Craig, who does lots of public debates and discussions on the Christian faith, the evidence for it, and some of the common challenges to it. Lots of videos and other materials on the website.
One that's been around for a bit longer is the L'Abri fellowship, founded by philosopher and evangelist Francis Schaeffer, and they have a vast online library of lectures and talks on modern thought, philosophy, psychology and Christianity. A real treasure trove http://labri-ideas-library.org/index.asp