Blackberry Moonrock First ever grow

First vegitative week. First photo 5 days after sprouting, second photo 8 days. Plant seems strong and green. It is my first time, so i find it hard judge. Doesn't seem to show clear signs of a bad environment. To me the plant seems slow growing and a bit small, looking at other grows, but maybe i am wrong. Can some experienced grower give me some advice on how the plant looks so far? Thanks ahead!