Since you are getting on a motorcycle after a very long duration and going straightaway for a long ride, it would be advisable to get a manageable machine that’s not very powerful either. We would recommend you take a look at bikes like the Bajaj Pulsar N250, TVS Ronin, Honda CB300F, and Royal Enfield Hunter 350. All these motorcycles have smooth and torquey engines that aid easy drivability, are beginner-friendly, offer comfortable ergonomics and have compliant suspension setups.
While these are road-biased bikes, unless you have multiple serious water crossings or rocky trails on your route, you should be just fine on these with a little bit of cautionary riding. In case you have some serious off-roading planned, then your best bet would be the Hero Xpulse 210.
We would strongly advise a test ride of each bike before you make a decision.