So I am not following your question, do you want someone to give you the protestant apologetics of justification and salvation from their point of view?
The problem with the protestant position stems from their poor understanding of the justification. In fact many believe that we are imputed righteousness on account of Jesus sacrifice and we are covered with it.
Therefore nothing we can do merits anything. In fact many believe that anything we do in this life does not matter much.
Once you accepted Jesus, as your Lord and Saviour, you can go on your merry sinful ways, you have arrived, you are there! An assured entry in Heaven.
The problem with this position is that it is wholly unbiblical. No where in the Bible is this doctrine found, Jesus was very explicit on who would be saved.
We are justified in our Baptism. At this event we are joined to the Church, founded by Christ, yes! Even a protestant is joined to her, albeit imperfectly.
After our initial justification we need to “work” our way to Heaven. How? you may ask. With the works of mercy as Jesus told us:
Matthew Chapter 25
25:34 Then the King shall say to those who will be on his right: ‘Come, you blessed of my Father. Possess the kingdom prepared for you from the foundation of the world
25:35 For I was hungry, and you gave me to eat; I was thirsty, and you gave me to drink; I was a stranger, and you took me in;
25:36 naked, and you covered me; sick, and you visited me; I was in prison, and you came to me.’
25:37 Then the just will answer him, saying: ‘Lord, when have we see you hungry, and fed you; thirsty, and given you drink?
25:38 And when have we seen you a stranger, and taken you in? Or naked, and covered you?
25:39 Or when did we see you sick, or in prison, and visit to you?’
25:40 And in response, the King shall say to them, ‘Amen I say to you, whenever you did this for one of these, the least of my brothers, you did it for me.’
25:41 Then he shall also say, to those who will be on his left: ‘Depart from me, you accursed ones, into the eternal fire, which was prepared for the devil and his angels.
25:42 For I was hungry, and you did not give me to eat; I was thirsty, and you did not give me to drink;
25:43 I was a stranger and you did not take me in; naked, and you did not cover me; sick and in prison, and you did not visit me.’
25:44 Then they will also answer him, saying: ‘Lord, when did we see you hungry, or thirsty, or a stranger, or naked, or sick, or in prison, and did not minister to you?’
25:45 Then he shall respond to them by saying: ‘Amen I say to you, whenever you did not do it to one of these least, neither did you do it to me.’
25:46 And these shall go into eternal punishment, but the just shall go into eternal life.”
Nowhere did HE say come you who believed in me! In other words to declare Jesus to be our Lord and Saviour requires a little bit more that mere “Faith”
James Chapter 2
2:17 Thus even faith, if it does not have works, is dead, in and of itself.
2:18 Now someone may say: “You have faith, and I have works.” Show me your faith without works! But I will show you my faith by means of works.
2:19 You believe that there is one God. You do well. But the demons also believe, and they tremble greatly.
2:20 So then, are you willing to understand, O foolish man, that faith without works is dead?
Hope this helps