From 2022, for additional reference. 
To paraphrase part of my response in the older threads, you have a huge advantage over historical watchers, in that it’s comparatively easy to get complete story arcs via streaming / libraries / etc and get to watch a full story. Growing up, yeah, didn’t get that.
But you may need to mentally program yourself to get past the style of acting, laughable budget for costumes and sets of the earlier works. Same way you may have to tune it out for Star Trek TOS but perhaps more so. If that’s -harder- for you, then starting with Ecclestone’s run of modern Who and then going back to see how they got there if/when you love the series may well be easier.