Struggling to stay motivated and disciplined

Assalamualaikum everyone. I've been out of work for the last five months. I do my best to pray all five salah and read Quran, and I'm also practicing the skills for my job. I say istighfar a lot too. I've been going for job interviews but haven't had any success yet. The thing is, I know I should be doing more-preparing better and working harder-but every day I just feel so lazy, and I keep slipping up. I'm really disappointed in myself. I worry this is why Allah hasn't blessed me with rizq yet, even though I know what I'm doing wrong. My heart is still heavy after losing my mother two years ago. Being without a job also means I can't move forward with marriage because of finances. I find myself crying alone at night, staying up late, and missing Fajr because I oversleep. I wasn't always like this-I used to pray on time consistently. I really want to do better, but I feel so down and it's a struggle just to get up for prayer. I manage four salah a day now, plus nawafil, but it's still not five fardh. I don't know how to get past this and pray all five. I miss my mom and wish she was here. If anyone has advice, I'd really appreciate it-I don't want to lose closeness to Allah, He's all I have.