Firebase problem

Question

Hay friends I wanna learn about Google firebase a backend platform. I tried my best and tried to learn but its documentation is quite confusing for me. Actually I need a personal tutor who can help me in this (Send DM). I also searched it over here but not got the satisfactory answer so please dont say that use search bar before asking questions. See my try I was trying to write data from a web app . I searched it from YouTube also but it seems that now firebase is updated and many new features are introduced which are quit confusing. So if anyone have any best and easy resources share it with me and clarify my problem of this web code.
https://code.sololearn.com/W0he9yaxtq7M/?ref=app

Answer 1

<script src="https://www.gstatic.com/firebasejs/7.15.5/firebase.js"></script>
Use this

Answer 2

Learn from Net Ninja
https://www.youtube.com/playlist?list=PL4cUxeGkcC9itfjle0ji1xOZ2cjRGY_WB

Answer 3

https://code.sololearn.com/WV3YoZrkoGq5/?ref=app
Fully built on firebase rtdb & hosting

Answer 4

Its older one Heartless

Answer 5

All your SRCs are relative. So, the script isn't even included.

Answer 6

Can you please come to DM Arnesh

Answer 7

Means? What is DM?

Answer 8

Direct message

Answer 9

Hay guys some one writing into my firebase. With the above code and I am not able to it . Lol ☹☹.
You all guys are giving me tutorials in English. Its quit hard for me understand because it's not my native language

Answer 10

.

Answer 11

Yes you can dm me F҉R҉O҉N҉T҉ 🔚& 🔙🔚/ 𝔸𝕣𝕕𝕦𝕚𝕟𝕠 Lover

Answer 12

Pls I also need help for firebase also

Answer 13

Can you come to DM Jaseem Akhtar

Answer 14

https://code.sololearn.com/Wd1ur4soana2/?ref=app