Absolutely, a QQ190 can be flown without goggles. It is a fun drone to fly line-of-sight, however, If you have a Tango, you can enjoy flying FPV without goggles.
You will have to train yourself to make sure to concentrate on the Tango’s FPV screen, and not look at the quad line of sight at the same time- I will say that the Tango is more than capable for FPV but you have to focus on the screen intently.
If you want a cheap and good charger for the QQ190, check out the TBS charger- You just plug in the balance plug and it does the rest for you:
Let me know if that helps to answer your questions!