If the original manufacturer has given "sole/exclusive dealership or agency" to the current agent or distributor, then that agent or distributor can take legal action against you. If not, I dont think there is any problem.
You can't make any significant money with these. Best use of your free time in the long term would be to learn some skill that may even allow you to do full time one day. It can be anything like graphic design, content writing, forex trading or anything else you are good at.
You can find hardly any data entry jobs these days as manual data entry jobs are now mostly automated by software. If someone asks you to pay a fee to give you a data entry job, it very likely to be a scam/pyramid scheme. If you want to do some work without bidding for projects then...