Just for broadcast of your own txs onchain you only need to have installed bitcoin core and link to it some wallets like sparrow, electrum, green. That's all. And not even have to run it 24/7.

bitcoin_beginners

Run A Bitcoin Node: Simple Tutorial With Umbrel Home

all depends of what do you want to do.
Just for broadcast of your own txs onchain you only need to have installed bitcoin core and link to it some wallets like sparrow, electrum, green. That's all. And not even have to run it 24/7.