which is the more lucrative endeavour for a newbie hoping to benefit from cryptocurrency at first between Bitcoin mining and Bitcoin trading?
both can be lucrative but if you are new to cryptocurrency it would be better for you to do your own research first on Bitcoin mining, Bitcoin trading and bitcoin and cryptocurrency in general. that way you have an Idea of what you are getting into and not just rely on what people say on which of the two will be more lucrative.
Are there other Bitcoin endeavours one could be interested and invested in, other than trading and mining?
if you have skill/s that you can offer online, then you can offer your service and ask to be paid through Bitcoin, we have a board here where you can post your
Service. you can also try HODLing Bitcoin.