Thanks for at least taking a look and replying =) I do know a bit of Django and will likely extend to other dbs, if there's a need. I originally connected to both HIVE and Greenplum databases because that's what I have at work. As a hobby, I just create postgres dbs on AWS so I mainly connect to those these days. Thanks for the tip.
I use a pile of book with the mobile phone on the top of them. For photos I use CamScanner free because it crops automatically the photo, auto contrast them and save multiple pages as a pdf.
Lisbon is my 'home' since ~8 years. Since I know the place well I started there. But as suggested I would like to collect similar data for several (European) cities and compare the results. For example Lisbon has a very high tourists/locals ratio which can be a reason for the huge number of trips shorter than 1km.
I don't know if you "know" Django ORM or pyDAL... If use a database abstraction module you could extend your project easily to other databases.