I wouldn't say development of such page would be complicated but you need to have knowledge of apex and VF page both in order to achieve this. If you have development experience on Java/JSP then it's almost similar to it. Follow this link on VF development guide. There are trailhead modules also available for the starter.
Another way you can achieve this is by placing custom link on standard page layout near picklist and it can take user to respective section on page without writing VF page but you will need to find some java script hack(which must be possible) to take user to respective section based on selection of value in picklist. Though here user still needs to click link rest of process to take the user to the appropriate section can be taken care by the custom link. There is close to similar approach done on the following link..in your case there are sections of page layout which won't have any ids but something similar you can try.This approach can avoid you writing VF page.
I wouldn't say development of such page would be complicated but you need to have knowledge of apex and VF page both in order to achieve this. If you have development experience on Java/JSP then it's almost similar to it. Follow this link on VF development guide. There are trailhead modules also available for the starter.
- https://developer.salesforce.com/docs/atlas.en-us.pages.meta/apexcode/pages_intro.htm
Another way you can achieve this is by placing custom link on standard page layout near picklist and it can take user to respective section on page without writing VF page but you will need to find some java script hack(which must be possible) to take user to respective section based on selection of value in picklist. Though here user still needs to click link rest of process to take the user to the appropriate section can be taken care by the custom link. There is close to similar approach done on the following link..in your case there are sections of page layout which won't have any ids but something similar you can try.This approach can avoid you writing VF page.- http://salesforce.stackexchange.com/questions/63095/link-button-which-move-to-relevant-section-on-page
Please let us know if this helps.Thanks,
Nagendra