https://cula4.ie/ is handy. media made for kids/young people is great for getting used to sentence structures and common vocab. they've got everything from "saol faoi shráid" to the irish dub of "shrek"!
https://www.rte.ie/player/series/bluey-as-gaeilge/10019908-00-0000 "bluey" is available in irish on the rté player just beginning this week or so. the first episode says there's only 6 days left to watch it, so they won't be up forever, sadly.
https://snas.ie/ has a load of resources starting at level B1; i enjoyed going through the lessons based on "ros na rún", and the explanations for the grammar/vocab in them are in english.
a blog i keep coming across when i'm looking for explanations online is https://toingaeilge.com/ too. it hasn't been updated in a few years, but it has some great breakdowns & good lists of resources too.
https://www.foclach.com/ and https://seafoid.com/ are some daily word games (based on wordle and waffle) that might help with expanding vocabulary. i find seafóid easier & it pops up with a definition as soon as you get each word.
other than that, i recommend reading as many books in irish that you can get your hands on, starting with books for kids & working your way up. starting at too high a level is likely to just be frustrating & demotivating, so focus on what you can easily do now & keep adding to it.
for getting books, your local library's online catalogue will let you know what it has & what it can get via inter-library loan. (free resources are my favourite 🥳)
i'd recommend these for buying books in irish, if there's nothing of interest anywhere local: https://www.siopaleabhar.com/ https://www.siopagaeilge.ie/ https://www.litriocht.com/
ádh mór ort! 🙌