Learning how to speak English nowadays is not so difficult with Google as your friend. You can find tons of tutorials on the web on how to speak proper English. You can also find tools that could help you learn better. Check out this pronunciation tool helper that you can use in order to speak English correctly. You can also switch from different accents if you want.
First, go to google.com. When the search bar appears in the middle of your screen, type “how to pronounce + (the word)” . Change “the word” with the word you want to learn. If the tutorial for the pronunciation of the word is available, you can check on how would you pronounce the word in English both in the American accent and British accent.
Another way is to just go to Youtube and search on how to pronounce + the word and tutorials on how to say that word would pop up. Enjoy!