Ionic sending push notifications for beginner



I’m a beginner programmer and need to able to send push notifications to my phone.
I have tried several tutorials but they have become old or I just haven’t been able to get them to work.

Could someone write instructions “for dummies” style or link a very precise and informative tutorial?

PS. I tried this tutorial: and managed to get to the point “Send Real Ionic Push Notifications - Android” but my log didn’t give me any sender id. Any help on this what could be wrong? In the comments someone mentioned about changing GCM key but ain’t that old tech?

Thanks a lot in advance!