Where to keep TVR?

Hi there, newbie question here..

I didn't keep any fish for very long liao, lately, intro by my fren and point me to some forum and been reading a lot about gold fish and the Ranchu.

And now I keep thinking of keeping some goldfish in my place, thus to start light, want to get 2nd hand tanks, maybe 2 tier tank since I can start with one tank first and later add more fish to the 2nd tank.

But, the question is, if I want to keep TVR, then the glass tank I only can see from the side? So, most of you keep it in the blude fibreglass pond or what?

Thanks!