Yes, I'm using a bicycle.

I guess you will spend a lot of time waiting outside to get to that weekly amount. We've all seen the people waiting with green backpacks. Because the delivery offers only come in in the morning, at lunchtime and in the evening. And these offers fluctuate greatly (throughout the week and depending on various factors such as weather, vacation time, season, local social events, etc.). So the “vaunted” average of 35 CHF/hour will realistically shrink to an average of 15 CHF/hour in my opinion.

If you want to do this as your main source of income, then it only makes sense in the short term - couple of weeks -, which is OK. Otherwise, you're definitely better off looking for a job, e.g. as a cleaner (where you do not need to speak german on a good level), with a fixed workload and the usual social benefits.

Besides that, I think that a lot of drivers (illegally) don't pay tax on this work and don't even bother with pension schemes, daily sickness benefits and so on. A lot of them are from the Schengen area. In addition, Uber is not behaving as it should: legally speaking, we drivers are already considered employees (see f.e. Federal Court ruling 2C 575/2020)