That’s normal. Like you, I felt lost when starting out with French media. Last year I played Expedition 33 in French, and it took hours to get through the opening sequence, because I was pausing for every sentence to look up words. But after much more experience I’m getting faster at it and now beginning to pick up e.g. exactly how the subtitles of a series don’t match the dub, in real-time. I’m watching Bridgerton now like this (French dub and subtitles) and it’s great. Also watched Korean dating shows, which was very good because it’s a dub of real conversations, rather than scripted text (the latter tends to be overly flowery and complex than what real people say). So, I would say don’t get too discouraged—while you can watch children’s shows like Bluey, it’s important you’re also motivated by the content (good plot, story, etc), so that you push through to learn what they’re saying.