I tend to veer towards encouraging people that just about anything is possible on a bike so I'll start off positively -
Of course you can do it!
As suggested above CrazyGuyOnABike will give a lot of info about routes, equipment etc.
It's for you to decide on your accommodation options which will in turn influence what weight you're carrying and indeed what bike is best to use.
I've no idea what long distance cycling you've done but you should be comfortable on your bike for hours at a time. If you're not, get comfortable!
You should also be able to carry out basic repairs to your bike - punctures, brake adjustment etc. - for the confidence if nothing else.
Finally, you should be comfortable with whatever options you use for planning and navigation. If using GPS or an app stress test them before departure and make sure you can power them!
Now the negatives;
I pick up a sense of urgency from your post, an urge to get from A to B as quickly as possible. To me, that is not "touring" in the usual sense and brings its own (mental) challenges. Mechanicals, diversions, weather delays are all parts of "normal" touring but could be big pressure points for you. Similarly, slowing down to "smell the roses" is (for me anyway) a great motivator for the more unpleasant parts of a tour and a balm after a tough time. Give yourself time and options to enjoy the ride itself.
A lot of (enjoyable) cycle touring is not actually about cycling the bike long distances. It's about logistics - where to eat and drink, where to sleep, how to navigate and how to pay for everything.
The fact is that logistics are going to be an unknown quantity for a while and availability of services may well vary from region to region, never mind country to country.
I'm thinking of places like campsites, hostels or hotels that are closed due to economics or limited in capacity due to the need for social distancing. I'm thinking that a solo cyclist in a rural area in 2020 is going to have a different reception to one in 2019 if looking for a spot to throw up a tent.
Language and the ability to understand written and oral instructions as well as express yourself will be important too. I've never been too bothered about language before, but these are different times. Six months ago I could use Google Translate on my phone - not many people will want to get that close to a sweaty stranger on a bike now.
Weather may well be a factor - especially the heat if you're considering this in the summer. In fact, these are the times to make sure you're in, and remain, in tip top health.
If I was in your shoes I'd give myself lots of time for this little adventure.
I'd start off with the intention of following and connecting whatever established cycling routes I can find on the basis that I'll meet kindred spirits along the way, navigation and facilities should be easier & more available and welcomes may well be a little warmer.
I'd start off slow and slowly build up my progress. I'd pay lots of attention to my body and react accordingly.
To keep myself motivated I'd think about what a wonderful story I was living!
Resources:
Do. Not. Depend. On. Google. Maps.
It's great for highlighting places and saving maps offline but not for planning bike routes.
@Richard Fairhurst above is too modest to mention
https://cycle.travel/ probably the best bike touring planner there is. It will show main long distance cycling routes. Also shows camping & hotel options.
https://www.biroto.eu/en/cycle-routes is another resource for long distance routes and useful for linking routes.
Osmand is a great app for planning and following routes and works offline. Has been my backup for years.
https://osmand.net/
https://www.crazyguyonabike.com/?o=1mr. For all things bike touring. A fantastic search facility and a great source of inspiration.
Don't forget YouTube for touring videos, product reviews and "how to" videos.
The very best of luck to you and please come back and update us!
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