I'm going to say up front that the advice I'm about to give holds up for most people. There are people with learning disabilities and other divergencies that need to be considered. But if that doesn't apply to you, don't worry about it, and just follow the general advice.
For the general advice, the first thing you need to wrap your mind around is that "learning kanji" isn't really a thing. Not in the sense that you sit down and drill kanji in isolation without context. Learning radicals also falls under that. It's not that it's not helpful. The problem is that it's not necessary and is a time waste.
There's nothing you really need to do aside from diving into the JP1K and start exposing yourself to kanji through reading (shows with Japanese subtitles counts as reading). The JP1K is designed to familiarize you with a lot of the most common kanji you'll see as well as teaching you vocabulary, which is the actual useful part. Drilling radicals doesn't help you comprehend your immersion but learning words does.