If I started a new job, and discovered that it was not what I want, shall I resign and return back to my old job, or adapt myself to the new position?

BE VERY CAUTIOUS, GIVE YOUR SELF TIME PERHAPS YOU'RE STILL IN ADJUSTMENT PERIOD DO NOT RUIN THE CHANCE AND TRUST GIVEN TO YOU. MEN ARE ALWAYS HASTY IN NATURE.

ADAPT IT AND ENHANCE MY CAREER TO DISCOVER NEW OPPORTUNITIES.

  thanks for invitation

if you dont like this job and the old job is ready for u return back to the old

 job unless u found the job that u are want 

u will not be comfortable in the new job and u will face a new pressures u the old job u know its responsibilities and it wont be difficult for u

Thanks 

In my opinion, yes you can resign, but you can not return to you previous job, you need to find something new 

Prior to joining, I would have thoroughly understood if I will be able to contribute effectively to the position I am about to join. Once I do, I will definitely adapt, learn and ensure to I add value to the position.

I guess you should stay and learn new things there for some certain time period then find some new one with complete home work.

ADapt to new job to enhance my skills and vision

I will never get back to my old job rather i will prefer to explore something new and meanwhile i would stay and learn the new things. I would prefer to make that job an interesting one by adding my skills and bring  changes (If my boss allows) and make it adapted according to my interests.

you have analysis your stips this first point

why came to this new work if you found its deffer from the offer you can ask management about that .

if not you have to stay in its 

and ask your self why i change my work ..salary  or development ..etc 

if you found the answer you can find the decesion if continues or back 

Adapt it and Enhance my Career to Discover new Opportunities....

i should first try to learn and read in alot of different sources about the job position to undertand it more then adapt to it if im leading the organisation to a failure or negative feedback i should immediately resign.