Seats on the Senna curve give a great view of a lot of the track, as shown in this old video.
Read about spectators experiences and reviews, and the best seats for the Brazil F1 at Interlagos, here.
Stand M is also covered, has a TV and is high up so you can see plenty of the track.
Obviously the threat of crime in Brazil is well-known, but take standard care and you can get a simple train direct to the track.
As an old classic track, the facilities are not very good, and no one actually follows seat numbering, so you will need to get there early-ish to get good seats.
For the lowest priced accommodation and best deals on your travels, use Agoda.
For fun F1 betting, choose Skybet. They have really good deals like free bets and on-going monthly free bets.
You may need to use a UK proxy if you want to bet from outside / not in the UK.
You can also watch F1 online, securely, by simply selecting the UK setting on a proxy.
Using this UK TV proxy for F1: click here – you can pay a small amount (about USD 68 a year!!) to use a UK proxy