I'm planning a trip from April to June 2020 flying from Sydney, Australia. I've worked out where I'd like to go and need help with a practical path from start to finish. I havn't booked anything yet and am open to any suggestions. I'm early 50's and going through a marriage break-up so I'd like a stress-free, more relaxing journey where possible and prefer to visit fewer countries to experience their cultures properly rather than more countries with not enough time spent in each. I thought I'd start in Vienna perhaps and finish somewhere warm and beautiful like Croatia.
I'm interested in natural beauty, hiking, walking, bike riding, food, wine, architecture, castles, history. I'm not really interested in wandering around huge churches, museums and art galleries although I expect some would be a must see.
I wanted mostly a rail trip where possible and happy to do sleeper. I thought about doing a group tour to gain some confidence and meet people, perhaps at the beginning of the trip although I like the idea of Rick Steve's 14 day adriatic tour encompassing Slovenia and Croatia in June at the end of the trip.
My rough Itinery;
Vienna - 4 nights
Salzburg - 3 nights
Bratislava - 2 nights
Vienna - 2 nights
Cesky Krumlov - 2 nights
Prague - 4 nights
Wroclaw -2 nights
Torun - 2 nights
Gdansk - 2 nights
Warsaw - 4 nights
Krakow - 4 nights
Zakopane - 2 nights
Budapest - 4 nights
Belgrade - 2 nights
Kotor - 2 nights
Mostar - 2 nights
Sarajevo - 2 nights
Zagreb - 2 nights
Ljubljana - 2 nights
Lake Bled - 2 nights
Istria - 2 nights
Rijeka - 2 nights
Split - 3 nights
Hvar - 2 nights
Plitvice Lakes - 2 nights
Korcula - 2 nights
Dubrovnik - 3 nights
What should I add/change? Thanks in advance for any help :)