Looking for hikes led by botanists or naturalists

My partner and I are planning our next trip to Garhwal. We are keen to learn to identify plants and birds and wildlife. We are wondering if people with knowledge of botany/zoology are leading guided hikes through areas of rich biodiversity. We are amateurs but have spent over 15 years observing, photographing, and growing plants native to California, so we have some familiarity with plant families and knowledge of our own to share. Would love to communicate with people like ourselves, serious enthusiasts or trained professionals who have a passion for the mountains and nature, and who want to deepen their appreciation of nature through species identification and observation. Is there a local nonprofit group like Uttarakhand Native Plant Society that might organize hikes like this? Welcome any tips or suggestions, including recommended field guides and books on Himalayan plants, birds, and wildlife. Thanks to the creators of this wonderful forum where I can even begin to put out this query.