Understand the pros and cons of what is it you want to incorporate into your regimen. Do you want to incorporate heat usage? Do want to use conditioners containing silicones? Then make certain you research the pros and cons of such practices. Without understanding all aspects of what it is you want to incorporate into your regimen, such adjustments can adversely surprise you ... and your hair.
Start with one adjustment. Making multiple changes to your regimen at once can make it difficult to identify the culprit if setbacks happen. This step especially applies to newbies in their hair care journey.
Try your new product more than once and in various ways. Products that fail to work the first time or via one method make work the second or third time and via another method. I have had this experience with such products as coconut oil, shea butter, and certain conditioners. While coconut oil fails to moisturize or seal my hair after a fresh wash, it is actually moisturizing when I use it as a pre-poo or mixed with shea butter as a sealant. While shea butter alone does nothing for my hair, it works very well when mixed with oils and even aloe vera gel.