Need some advice 😔☝🏻

Hello guyss ,I'm 16M I wanna Improve My English speaking Skills.
My english is fine If I'm chatting with but sometimes I mess up with my words because of My Low confidence when i try to speak english 😭, Even I Stutter Many Times even in my Native Language I'm gonna Use Peer-up (1:1 Call app to improve english) after My Board Exams & will be Consistent 💪🏻 Do You Guyss have any Tips to Improve My confidence ,I feel anxious around People +I live in a Rural Area so I don't have any single person with whom I can practice my english (STUCK WITH NPC'S) Another problem is that , When my Voice started to Change like lil deeper in My teenage Just after that moment I'm having Problem With pronounciations. is this Normal? Earlier my Voice was like a babyy (Ladkiyon se Jyada ladki vali voice thi meri 🤡) Jabse change hui tabse Har 5 minutes me tounge slip hori 😭☝🏻 If anyone knows Solutions for this Please tell me 🥰