Edi

Hi Philomena, it is easy to go around Old town for someone who is not very confident, it is not large town, all streets lead to the main street Stradun/Placa so you cant get lost. Locals are friendly and will show you directions if you are unsure. You can download some maps here dubrovnik-travel.net/map/ for you to study and once you arrive there, take some free maps from local tourist office. You can also use your smart phone map app to help you walking around the town. Enjoy!

See this page for all options about travelling between Venice and Dubrovnik – here:
https://www.dubrovnik-travel.net/travel/venice-dubrovnik/

check this page
https://www.dubrovnik-travel.net/travel/getting-brac-dubrovnik/

If you see taxi approaching just stick out your arm and taxi will take you if not busy. Taxi rides in Dubrovnik are completely safe and reliable.
If you feel more comfortable with Uber you can use that too.

yes, you can buy fishing licence online here :
http://www.mps.hr/Ribarstvo/default.aspx?id=71

there are no trains to / from Dubrovnik, the nearest train station is in Ploce

https://www.dubrovnik-travel.net/getting-to-dubrovnik-by-train/

if you don’t like buses, you can either rent a car or take private transfer

yes, the bus route no 7 will take you from Dubrovnik main bus station Autobusni Kolodvor to Lapad in vicinity of your accommodation

more info is here : https://www.dubrovnik-travel.net/dubrovnik-bus-station/

The Ferry boat going from Dubrovnik to Mljet national park is here:

https://www.dubrovnik-travel.net/travel/dubrovnik-to-mljet/

Lastovo is not to far , you can do day-trip there from Dubrovnik in July and August – check this info:

Ferry Catamaran Dubrovnik – Sipan – Mljet – Korcula – Lastovo

I would suggest you to do day trip to Mljet National Park too – check details here:

https://www.dubrovnik-travel.net/travel/dubrovnik-to-mljet/

Yes this journey is possible but not in one day as there is just one ferry a day that sails from Split via Mljet to Dubrovnik. All details and prices are here:
https://www.korculainfo.com/ferries/ferry-split-milna-brac-hvar-korcula-mljet-dubrovnik/
you can book it in advance on krilo.hr site.

The best option for car ferries is to check on croatiaferries.com site, all ferry options are listed there as well as prices.

However, no advance booking for car ferries is available.

https://www.croatiaferries.com/ferry-timetables.htm

Yes, that is possible.

For ferry boat from Hvar to Mljet check this:
https://www.croatiaferries.com/hvar-pomena-ferry.htm

Yes, there is a taxi service on Mljet which can take you from Polace/ Pomena to Sobra.

Taxi from Prapratno to Dubrovnik you can book in advance, though there is a bus you can get from Prapratno to Dubrovnik at 16:00 hrs

Bus from Dubrovnik to Orebic

If you would like to focus on culture and architecture you could spend time in Dubrovnik and Korcula.

Mljet is good for outdoors, walking and similar.

Hvar is bit too far from Dubrovnik if you stay in the area for one week only unless you decide to fly back home from Split.

In that case you could do a day trip to Hvar or Trogir from there.

Day trip to Mljet is here: https://www.dubrovnik-travel.net/travel/dubrovnik-to-mljet/

For other day trips from Dubrovnik check this : https://www.dubrovnik-travel.net/day-trips-from-dubrovnik/