If you really badly want access to the sea to import heavy weapons to fight Amhara then do a deal with Somalia. We will give you access to the sea if Ethiopian government gives the Somali region to Somalia.
Than we will both be happy and winners. Otherwise if you refuse. You will not have access to the sea. No heavy weapons and FANO will destroy you and Somalia will still take the Somali region.
Eritrea will NEVER help you because you are Galla and they are Habesha.
Abiy and Galla's think about it very carefully. Don't waste your chance. Don't end up like Tigrays and regret.