I think If you wants to go for a solo trip then you should have a rider experince start your journey on a Royal Enfiend from Manali to ladakh and feel the nature by closing the eyes you always feel this trip ever.
Pondichéry, Pushkar, Udaipur, Kasol are the ones I would recommend. Final choice will depend on what you would like to do. Pushkar gives a good melange is east and west. Udaipur has lots to offer to a tourist in terms of experiences. Pondichéry has beaches, churches, colonial vibes. Kasol will take you close to nature and chill
Here are the following best destination for the solo trip:
5. Chikmagalur These are the destinations for the weekend trip from Bangalore but the beauty of these places make it solo-traveler's destinations. You can get full details of these destination on the given link https://bit.ly/30JJTf1