We have discussed the first phrase before. Note, once again, that the word מִמֶּנִּי is actually the stand-alone preposition מִן with a 1cs pronoun suffix. Also note the form עֲלֵי has the extra י at the end as we mentioned was possible.
וְלֹא־הִלַּכְתִּי בִּגְדֹלוֹת וּבְנִפְלָאוֹת מִמֶּנִּי – “and I do not walked in things too great and wonderful for
עֲלֵי אִמּוֹ – “upon his mother”
כַּגָּמֻל עָלַי נַפְשִׁי – “as a weaned child upon me is my soul”
יַחֵל יִשְׂרָאֵל אֶל־יְהוָה – “wait, O Israel, for the Lord”
מֵעַתָּה וְעַד־עוֹלָם – “from now and until eternity”