I am having difficulty concentrating in prayers and I feeling hopeless when it comes to career. What should I need to do in order to come closer to Allah (swt), be successful for akhra and duniya. Shukrya, need your insight in this.

Try to be in the state of wudhu all the time and kindly stop eating outside and refrain from the food which is doubtful or you are unsure about it
Say Azan and iqamah slowly and try to concentrate on meaning if you do all then again focus in your prayer and ponder in recitations and please read ayah 162 from Surah Anaam before the niyat.