
And for books I’ve been going through Botany In A Day and the really highly recommended Plant Systematics
When trying to learn any new discipline, I recommend this strategy. First, identify some competent world-class universities. Second, search for their related programs. Third, obtain a list of textbooks for those courses. Finally, obtain said textbooks (eg. LibGen). However, if you are feeling lazy just search the topic directly (but be sure to use the scientific title) and then order descending by year. Any textbook with three or more editions is probably well regarded. This method would recommend: ISE Stern's Introductory Plant Biology (15th edition), Botany: An Introduction to Plant Biology (6th edition), Botany for gardeners (3rd edition), Botany in a Day: The Patterns Method of Plant Identification (6th edition), Laboratory Topics in Botany (8th edition).