We are fortunate to live in times where there are myriad evidence based resources online.
If you are looking for Hypertrophy (adding muscle) specifically I would recommend Renaissance Periodization (Dr. Mike Israetel) and Jeff Nippard on YouTube or their websites.
If you are looking for strength or general wellness I can not more highly recommend Barbell Medicine. I've had great success with several of their programs and my friend had tremendous success running their beginner template: https://www.barbellmedicine.com/shop/training-templates/strength/beginner-template/
Even if you don't buy a template they are a wealth of great information that is freely available.
Best of luck and congrats on taking that step!