For the name format you want to look into the terseinits option and the command \revsdnamepunct as well as the family-given name format. See also Abbreviate author names as "Lastname AB" (without space or period) in bibliography, biblatex: remove commas between last and first names in bibliography
For the remaining features of the style, some more details are explained in Guidelines for customizing biblatex styles,
Remove Quotation Marks from Style, Move names of editors followed by (Ed./Eds.) and a comma before title in biblatex, Suppress "In:" biblatex.
If you have any questions about the code below, just ask in the comments. Many names are pretty self explanatory.
\documentclass[british]{article}
\usepackage[T1]{fontenc}
\usepackage{babel}
\usepackage{csquotes}
\usepackage[
backend=biber,
style=ext-authoryear,
maxbibnames=999,
giveninits=true, terseinits=true,
uniquename=init,
articlein=false,
innamebeforetitle=true,
]{biblatex}
\DeclareNameWrapperFormat{sortname}{\mkbibbold{#1}}
\DeclareNameAlias{sortname}{family-given}
\renewcommand*{\revsdnamepunct}{}
\DeclareFieldFormat{editortype}{\mkbibparens{#1}}
\DeclareDelimFormat{editortypedelim}{\addspace}
\DeclareFieldAlias{translatortype}{editortype}
\DeclareDelimAlias{translatortypedelim}{editortypedelim}
\DeclareDelimFormat[bib]{nametitledelim}{\addspace}
\DeclareFieldFormat
[article,inbook,incollection,inproceedings,patent,thesis,unpublished]
{title}{#1\isdot}
\DeclareDelimFormat[bib]{innametitledelim}{\newunitpunct}
\renewcommand*{\volnumdelim}{}
\DeclareFieldFormat[article,periodcal]{volume}{\mkbibbold{#1}}
\DeclareFieldFormat[article,periodcal]{number}{\mkbibparens{#1}}
\DeclareFieldFormat[article,periodcal]{pages}{#1}
\addbibresource{biblatex-examples.bib}
\begin{document}
Lorem \autocite{sigfridsson,worman,nussbaum,geer,aksin,
companion,westfahl:space}
\printbibliography
\end{document}

Please note that most publishers do not accept biblatex submissions. I would only look into using biblatex for journal submissions if the author guidelines explicitly mention biblatex. Double check what the submission guidelines have to say about LaTeX submissions and if there is an article template or document class.