You may pray according to any of the authentic schools, including Hanafi, Maliki, Shafi`, Hanbali. You may also follow the method of prayer by the eminent Salafi scholars.
The differences among these schools do not concern the basic format of Prayer; rather, they concern only the minor details.
Having said this, I would rush to state: If you are coming from a country where the majority of Muslims and your community follow any of the four schools such as Hanafi or Malik or Shafi` or Hanbali, I will urge you to stick with their practices.

 

If, however, you face an issue for which you wish to seek expert guidance, you may turn to any of the respectable scholars, regardless of his school affiliation.
Finally, I would also urge Muslims not to be rigid about differences among schools on such matters creating division and disunity. We may do well to remember that most of these differences originate in the practices of companions and successors, yet they never condemned each other for such differences; rather they continued to pray for each other and greet and pray for each other.