I personally think that a lot of the easy manga suggestions are not really helpful to me. Maybe it makes sense to someone further along in grammar and vocabulary, but for me, Dragon Ball was not easy to start. Titles like: Yostuba!, Chi’s sweet home were, but still they can be a bit much here and there, I honestly found more help doing some extensive reading with picture books starting from another forum post here: えほんのチャレンジ：0歳 "Picture Book Challenge: Age 0" - #2 by nbeck0212 .
When I search for titles, I usually will search in Japanese for recommendations based on age grounds/school years.一年生小学 (first year elementary school), and マンガ, or Something like 小学1-2年の男の子マンガ (elementary school, 1-2 Year, boy’s book). Or with 女の子. Or other young gender terms just to see if it suggests different titles. Here is an example of what can be pulled up by those search terms: サービス終了のお知らせ - NAVER まとめ.