How to revise the manuscript (one reject and one accept in first decision) and what could be the final decision?
There is no real way of knowing what the outcome will be without seeing the feedback. It honestly depends on the primary reviewer. Depending on what the formal process is for IEEE ACCESS, either one reviewer will have the ultimate say, or both reviewers will have to agree on a result. 

I've been in this situation a few times and it has gone both ways. Looking at your feedback summary, there's nothing fundamentally wrong with the research which is always a good sign (I've had more than my fair share of reviewers simply disliking the premise of my research which is a complete non-starter). Ultimately, you need to work hard on the revision and write a cover letter that addresses each of their points.

The cover letter is a really important part of this process as a lot of reviewers will use this as the basis for their decision. Be sure to respond to each of their comments methodically, and clearly. Try to avoid using vague language such as "We've added more detail to the conclusion", but instead provide a clear description of the changes you made. 

It sounds like reviewer two had an issue with the language used. If you've got any strong English language researchers in your department, it's worth asking if they are able to proofread the document for you. Services like Grammarly are also useful to improve typos and grammar. Make sure you emphasise how much effort you put into improving this when responding to reviewer two's comments. This may be enough to nudge the needle in your favour.