Hey, if you have any doubts please ask me in the comments or follow me on instagram and join my telegram channel because their I will be providing resources related to video editing, if you separately want me to provide any resources ask me in the comments and I will be providing it to you in the telegram.
Best way is start your project in pr if you just want to write text do it in pr only and if you want to add text and add some text effects to it then just right click on the clip that you want to add the text on and find the option open in after effects composition or something similar then the clip will be visible to you in the after effects, now add the text and add any text effects that you want, save the project and get back to premiere pro it will be saved here also. Hope I clarified your doubt 😊😊