I suggest that you do some research on your own, starting by doing a Google search on this part of your first sentence: "How to speak fluent and correct English?"
As for your question, the paragraph might be improved as follows:
How can I learn to speak fluent and correct English, even though I don't have anybody to speak with me or correct me whenever I am wrong? I will not improve my English if I practice speaking it in the wrong way. Please help me to learn correct English. Please give me tips or tell me about any website which could help me. Are there any useful apps on Google Play Store which could help me? Also inform me if my question contains any grammatical mistakes.
Your English is actually quite good! But the ELL community expects your question to include what research you have done on your own. That is why your question has received down-votes. Please do some research and edit your question accordingly. Welcome to ELL!