What is it like to say –
Imam zamana will protect my life?

Yes we can say that because we do not intend that either he is Allah or we do not associate him with Allah we believe that he is Waseela.

Holy Quran 5:36
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إِنَّ الَّذِينَ كَفَرُوا لَوْ أَنَّ لَهُم مَّا فِي الْأَرْضِ جَمِيعًا وَمِثْلَهُ مَعَهُ لِيَفْتَدُوا بِهِ مِنْ عَذَابِ يَوْمِ الْقِيَامَةِ مَا تُقُبِّلَ مِنْهُمْ ۖ وَلَهُمْ عَذَابٌ أَلِيمٌ

Indeed, those who disbelieve – if they should have all that is in the earth and the like of it with it by which to ransom themselves from the punishment of the Day of Resurrection, it will not be accepted from them, and for them is a painful punishment
He is Hujjat e Khuda like Hazrat Aisa as

Holy Quran 3:45
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إِذْ قَالَتِ الْمَلَائِكَةُ يَا مَرْيَمُ إِنَّ اللَّهَ يُبَشِّرُكِ بِكَلِمَةٍ مِّنْهُ اسْمُهُ الْمَسِيحُ عِيسَى ابْنُ مَرْيَمَ وَجِيهًا فِي الدُّنْيَا وَالْآخِرَةِ وَمِنَ الْمُقَرَّبِينَ

[And mention] when the angels said, "O Mary, indeed Allah gives you good tidings of a word from Him, whose name will be the Messiah, Jesus, the son of Mary – distinguished in this world and the Hereafter and among those brought near [to Allah].

Holy Quran 5:110
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إِذْ قَالَ اللَّهُ يَا عِيسَى ابْنَ مَرْيَمَ اذْكُرْ نِعْمَتِي عَلَيْكَ وَعَلَىٰ وَالِدَتِكَ إِذْ أَيَّدتُّكَ بِرُوحِ الْقُدُسِ تُكَلِّمُ النَّاسَ فِي الْمَهْدِ وَكَهْلًا ۖ وَإِذْ عَلَّمْتُكَ الْكِتَابَ وَالْحِكْمَةَ وَالتَّوْرَاةَ وَالْإِنجِيلَ ۖ وَإِذْ تَخْلُقُ مِنَ الطِّينِ كَهَيْئَةِ الطَّيْرِ بِإِذْنِي فَتَنفُخُ فِيهَا فَتَكُونُ طَيْرًا بِإِذْنِي ۖ وَتُبْرِئُ الْأَكْمَهَ وَالْأَبْرَصَ بِإِذْنِي ۖ وَإِذْ تُخْرِجُ الْمَوْتَىٰ بِإِذْنِي ۖ وَإِذْ كَفَفْتُ بَنِي إِسْرَائِيلَ عَنكَ إِذْ جِئْتَهُم بِالْبَيِّنَاتِ فَقَالَ الَّذِينَ كَفَرُوا مِنْهُمْ إِنْ هَٰذَا إِلَّا سِحْرٌ مُّبِينٌ

[The Day] when Allah will say, "O Jesus, Son of Mary, remember My favor upon you and upon your mother when I supported you with the Pure Spirit and you spoke to the people in the cradle and in maturity; and [remember] when I taught you writing and wisdom and the Torah and the Gospel; and when you designed from clay [what was] like the form of a bird with My permission, then you breathed into it, and it became a bird with My permission; and you healed the blind and the leper with My permission; and when you brought forth the dead with My permission; and when I restrained the Children of Israel from [killing] you when you came to them with clear proofs and those who disbelieved among them said, "This is not but obvious magic."