This is the first time I am working with ESP8266-01. My initial goal is to get a small WIFI IoT Training project like this Initial goal video

Till now the only thing I was able to achieve was getting it flashed (nodeMCU Flasher) to the latest lua nodemcu firmware(nodeMCU Firmware) via FTDI board. After flashing, I tried using the IDE for ESP8266 (ESPlorer) and see if I can get it to show me the uploaded firmware. But every time it just showed gibberish data (checked with all the baud rates).

I even tried using Arduino after updating the latest firmware using the bare minimum sketch, but it again showed gibberish data (again checked with all the baud rates). I checked online multiple videos and tried each of them, but nothing works. To keep a standard discussion, I was following this video video.

The setup I am using is, - FTDI232 board with 3.3v output as an input to ESP I read that FTDI can only supply enough juice to upload the firmware, but what I am able to see is the FTDI 3.3v output supply gives 6v (open load)? Is this possible? The ESP works perfectly well at this voltage as I can see the red led glowing bright and blue LED flashing on first power ON. No heat nothing. - I then used Regulated power supply 3.3V, but with this the ESP power Red LED was quite dim and blue LED never even flashed.

I have 5 ESP8266 board, tried with 3 of them. All having the same issue. So for sure I am missing something. Can anyone help me understand what I am doing wrong?